When the garden was giving us more summer squash than we knew what to do with, casseroles like this were the answer. This low carb 4-ingredient summer squash casserole is the kind of humble side dish that turns simple pantry staples into something rich, savory, and comforting, with tender squash tucked under a blanket of creamy sauce and melted cheese. It has that old block-party charm to it too, the sort of recipe passed around on index cards and carried to potlucks in a warm baking dish.
This casserole fits beautifully alongside grilled chicken, pork chops, burgers without the bun, or a simple roast. I also like it with sliced tomatoes, a crisp green salad, or a spoonful of cottage cheese for an easy summer supper. If you are setting out a cookout spread, it holds its own next to barbecue and makes a fine substitute for heavier potato sides.
Low Carb 4-Ingredient Summer Squash Casserole
Servings: 6
Ingredients
4 medium yellow summer squash, thinly sliced
1 cup sour cream
2 cups shredded cheddar cheese, divided
1/2 teaspoon salt
Directions
1. Preheat the oven to 375°F and lightly grease a medium casserole dish.
2. Bring a large skillet or saucepan of water to a gentle boil. Add the sliced squash and cook for 4 to 5 minutes, just until barely tender. Drain very well.
3. In a large bowl, gently stir the drained squash with the sour cream, 1 1/2 cups of the cheddar cheese, and the salt until evenly coated.
4. Spoon the mixture into the prepared casserole dish and spread it into an even layer. Top with the remaining 1/2 cup cheddar cheese.
5. Bake for 25 to 30 minutes, until hot and bubbly with golden edges. Let rest for 5 minutes before serving.
Variations & Tips
Drain It Well: Summer squash carries plenty of water, so good draining is the secret to a casserole that stays creamy instead of soupy. After cooking, let the squash sit in a colander for a few minutes, and if needed, blot lightly with paper towels.
Try a Different Cheese: Sharp cheddar gives this casserole a hearty, familiar flavor, but Monterey Jack, mozzarella, or a Colby-Jack blend all work nicely too. Use what you have on hand if you want a milder finish.
Add A Little Extra Flavor: Even with only four main ingredients, you can tuck in a pinch of black pepper, garlic powder, or a spoonful of grated Parmesan if your family likes a stronger savory note. It will still keep that simple old-fashioned spirit.
Make It Ahead: You can assemble the casserole a few hours in advance and refrigerate it, covered, until baking time. If it is going into the oven cold, add a few extra minutes so the center gets hot and bubbly.