Tex-Mex Keto Squash Casserole
Cheesy and creamy, the Tex-Mex Keto Squash Casserole is a delightful side dish that brings flavor and comfort to any meal. Perfect for family gatherings or weeknight dinners, this low-carb recipe is not only delicious but also easy to prepare. The combination of summer squash, cheddar cheese, and zesty tomatoes makes this casserole a standout choice for those following a keto lifestyle.
Why You’ll Love This Recipe
- Low-Carb Delight: This casserole keeps carbs in check while delivering rich flavors.
- Quick Preparation: With only 15 minutes of prep time, you can have this dish ready in no time.
- Versatile Side Dish: Great alongside grilled meats or as a vegetarian option.
- Family-Friendly Flavor: The cheesy goodness appeals to both kids and adults alike.
- Easy Clean-Up: One skillet and one baking dish make for simple post-meal cleanup.
Tools and Preparation
Gathering the right tools will ensure your cooking experience is smooth and enjoyable. Here’s what you’ll need:
Essential Tools and Equipment
- Large skillet
- Medium-sized casserole dish
- Mixing bowl
- Cutting board
- Knife
Importance of Each Tool
- Large skillet: Ideal for sautéing vegetables quickly and evenly.
- Mixing bowl: Provides ample space for combining ingredients without mess.
- Casserole dish: Ensures even baking and perfect presentation straight from the oven.

Ingredients
For the Tex-Mex Keto Squash Casserole, you will need:
Main Ingredients
- 1 tsp olive oil
- 2 pounds summer squash, sliced
- 1 cup diced onion
- 1 can rotel tomatoes, drained (may use mild if desired)*
- 1 ½ cups cheddar cheese, grated (reserve 1/2 cup for topping)
- ½ cup sour cream
- ½ cup mayonnaise
- ¼ tsp salt
- ¼ tsp black pepper
How to Make Tex-Mex Keto Squash Casserole
Step 1: Preheat the Oven
Preheat your oven to 350 degrees Fahrenheit. This ensures that your casserole cooks evenly.
Step 2: Sauté the Vegetables
In a large skillet:
1. Heat olive oil over medium heat.
2. Add sliced summer squash and diced onions.
3. Cook while stirring occasionally until tender, about 8-10 minutes.
4. Drain any excess liquid from the cooked squash.
Step 3: Combine All Ingredients
In a mixing bowl:
1. Add the drained squash and onion mixture.
2. Incorporate the drained ro*tel tomatoes, cheddar cheese (reserve 1/2 cup), sour cream, mayonnaise, salt, and pepper.
3. Mix well until all ingredients are thoroughly combined.
Step 4: Assemble the Casserole
Pour the mixture into a medium-sized casserole dish:
1. Spread it out evenly in the dish.
2. Sprinkle with the reserved cheese on top.
Step 5: Bake to Perfection
Bake in the preheated oven:
1. Cook for about 20-30 minutes or until the cheese is melted and bubbly.
2. Allow to set for 5-10 minutes before serving.
Now you’re ready to enjoy your delicious Tex-Mex Keto Squash Casserole!
How to Serve Tex-Mex Keto Squash Casserole
Serving Tex-Mex Keto Squash Casserole can enhance your dining experience. This flavorful dish pairs well with various sides and accompaniments, making each meal unique.
With Fresh Avocado Slices
- Fresh avocado slices add a creamy texture that complements the casserole’s cheesy layers.
Alongside Grilled Chicken
- Pairing with grilled chicken introduces a satisfying protein element, making for a balanced meal.
With a Side Salad
- A crisp side salad brings freshness to your plate. Consider mixing greens with tomatoes and cucumbers for a colorful presentation.
Topped with Salsa
- Adding salsa on top of the casserole provides an extra kick of flavor and freshness that brightens the dish.
Accompanied by Cauliflower Rice
- Cauliflower rice serves as a low-carb alternative to traditional rice, complementing the dish well while keeping it keto-friendly.
How to Perfect Tex-Mex Keto Squash Casserole
For the best results when preparing this casserole, consider these helpful tips.
- Use ripe squash: Choose fresh, tender summer squash for optimal flavor and texture in your casserole.
- Drain excess liquid: Properly drain the squash after cooking to prevent a watery casserole.
- Customize cheese: Experiment with different types of cheese, like pepper jack or mozzarella, for varied flavors.
- Add spices: Enhance the taste by incorporating spices such as cumin, chili powder, or garlic powder into the mixture.
- Let it rest: Allow the casserole to set for 5-10 minutes after baking. This helps firm up the dish for easier serving.
- Store leftovers properly: Keep any leftovers in an airtight container in the fridge for up to three days. Reheat gently before serving.
Best Side Dishes for Tex-Mex Keto Squash Casserole
When planning your meal, consider these side dishes that pair wonderfully with Tex-Mex Keto Squash Casserole. Each option adds its unique flair.
-
Zucchini Noodles
Light and low-carb, zucchini noodles provide a refreshing twist that complements the richness of the casserole. -
Stuffed Bell Peppers
Filled with ground beef or turkey and spices, stuffed peppers are hearty and make a great addition to any Tex-Mex meal. -
Roasted Brussels Sprouts
Crispy roasted Brussels sprouts add a crunchy texture and slight bitterness that balances out the creamy casserole. -
Spicy Black Bean Salad
A mix of black beans, corn, diced tomatoes, and jalapeños offers a tangy and spicy contrast to the dish’s creaminess. -
Cilantro Lime Rice
Flavored with lime juice and fresh cilantro, this rice dish adds brightness while remaining keto-friendly if made with cauliflower rice. -
Guacamole
Rich and creamy guacamole provides healthy fats while enhancing flavors when served alongside your casserole.
Common Mistakes to Avoid
When making the Tex-Mex Keto Squash Casserole, there are common pitfalls you might encounter. Here’s how to steer clear of them.
- Using Watery Squash: If you don’t drain the squash well, your casserole may become soggy. Always drain any excess liquid after cooking the squash to maintain a good texture.
- Ignoring Cheese Variety: Not all cheeses melt the same way. Stick with high-quality cheddar for the best creamy results; avoid low-fat options which may not melt well.
- Skipping Seasoning Adjustments: Every palate is different! Taste your mixture before baking and adjust salt and pepper as needed to ensure optimal flavor.
- Overbaking the Casserole: Keep an eye on your casserole as it bakes. Overbaking can lead to dry textures; aim for that golden brown cheese topping without losing moisture.
- Not Allowing to Set: Patience is key! Letting the casserole sit for 5-10 minutes after baking helps it set up nicely, making it easier to serve.

Storage & Reheating Instructions
Refrigerator Storage
- Store in an airtight container.
- Keep in the refrigerator for up to 3-4 days.
Freezing Tex-Mex Keto Squash Casserole
- Allow it to cool completely before freezing.
- Use a freezer-safe container or wrap tightly with plastic wrap and aluminum foil.
- It can be frozen for up to 2 months.
Reheating Tex-Mex Keto Squash Casserole
- Oven: Preheat oven to 350°F (175°C). Cover with foil and heat for about 20 minutes or until warmed through.
- Microwave: Place a single serving in a microwave-safe dish. Heat in intervals of 1-2 minutes, stirring in between, until hot.
- Stovetop: In a skillet over medium heat, add a splash of broth or water. Stir occasionally until heated through.
Frequently Asked Questions
Here are some common questions about the Tex-Mex Keto Squash Casserole that can help you perfect this dish.
Can I use other vegetables in my Tex-Mex Keto Squash Casserole?
Absolutely! Feel free to add bell peppers, zucchini, or corn for added flavor and texture.
How do I make my Tex-Mex Keto Squash Casserole spicier?
For more heat, consider adding jalapeños or using spicy varieties of diced tomatoes instead of regular ones.
Is there a dairy-free option for this casserole?
Yes! Substitute sour cream and mayonnaise with non-dairy alternatives like cashew cream or coconut yogurt.
Can I prepare the Tex-Mex Keto Squash Casserole ahead of time?
Yes! You can assemble it a day in advance and refrigerate it until you’re ready to bake.
Final Thoughts
This Tex-Mex Keto Squash Casserole is not only cheesy and creamy but also versatile enough for any meal occasion. Customize it with your favorite veggies or spices to make it uniquely yours. Try this delightful recipe today!
Tex-Mex Keto Squash Casserole
Indulge in the creamy and cheesy delight of Tex-Mex Keto Squash Casserole, a perfect side dish that elevates any meal. This low-carb casserole combines tender summer squash, melty cheddar cheese, and zesty tomatoes for a flavor-packed experience. With only 15 minutes of prep time, this dish is simple enough for weeknight dinners yet impressive enough for gatherings.
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
- Yield: Serves 6
- Category: Side Dish
- Method: Baking
- Cuisine: Tex-Mex
Ingredients
- 1 tsp olive oil
- 2 pounds summer squash, sliced
- 1 cup diced onion
- 1 can diced tomatoes (like Rotel), drained
- 1 ½ cups cheddar cheese, grated (reserve 1/2 cup for topping)
- ½ cup sour cream
- ½ cup mayonnaise
- ¼ tsp salt
- ¼ tsp black pepper
Instructions
- Preheat your oven to 350°F (175°C).
- Heat olive oil in a large skillet over medium heat. Sauté sliced summer squash and diced onion for about 8-10 minutes until tender; drain excess liquid.
- In a mixing bowl, combine the cooked squash mixture with drained tomatoes, cheddar cheese (reserve some for topping), sour cream, mayonnaise, salt, and pepper. Mix until combined.
- Pour the mixture into a medium-sized casserole dish, spreading it evenly. Top with reserved cheese.
- Bake for 20-30 minutes until bubbly and golden brown. Allow to set for 5-10 minutes before serving.
Nutrition
- Serving Size: 1/6 of the casserole (approximately 200g)
- Calories: 280
- Sugar: 3g
- Sodium: 450mg
- Fat: 22g
- Saturated Fat: 11g
- Unsaturated Fat: 10g
- Trans Fat: 0g
- Carbohydrates: 9g
- Fiber: 3g
- Protein: 11g
- Cholesterol: 45mg