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Low-Carb Easy Cheesy Zucchini Bake

This delicious and simple zucchini bake combines fresh zucchini, yellow squash, herbs, and two kinds of cheese for a comforting low-carb side dish or light vegetarian main course. Perfect for summer squash season, it’s easy to prepare and pairs well with grilled meats or can stand alone as a cheesy vegetable casserole.
Prep Time15 minutes
Cook Time45 minutes
Total Time1 hour
Course: Main Course, Side Dish
Cuisine: American
Keyword: cheesy squash casserole, low-carb zucchini bake, summer squash recipe, vegetarian zucchini casserole
Servings: 6
Calories: 207kcal

Ingredients

  • 2 medium zucchini sliced or cut into half-moons
  • 2 medium yellow squash sliced or cut into half-moons
  • 4 tablespoons chopped fresh basil adjust to taste
  • 2 tablespoons thinly sliced green onion
  • 1/2 teaspoon dried thyme
  • 3/4 teaspoon garlic powder
  • 1 cup grated mozzarella cheese divided
  • 1/2 cup coarsely grated Parmesan cheese plus extra for topping, optional
  • Salt and freshly ground black pepper to taste

Instructions

  • Preheat your oven to 350°F (180°C). Lightly spray an 8" x 8" or 8" x 11" baking dish with olive oil or non-stick spray.
  • Wash and slice the zucchini and yellow squash into either full slices or half-moon slices, depending on preference.
  • Wash, dry, and finely chop the fresh basil. Thinly slice the green onions.
  • In a large bowl, combine the zucchini, yellow squash, chopped basil, green onions, dried thyme, garlic powder, 1/2 cup grated mozzarella cheese, and 1/2 cup grated Parmesan cheese. Mix well until everything is evenly coated and herbs are well-distributed. Season with salt and freshly ground black pepper to taste.
  • Transfer the vegetable mixture into the prepared baking dish, spreading it evenly.
  • Bake uncovered for 25-30 minutes, until the zucchini is mostly tender (a fork should easily pierce the squash).
  • Remove the dish from the oven and sprinkle the remaining 1/2 cup mozzarella cheese over the top. Add a bit more Parmesan if desired.
  • Return to the oven and bake for an additional 10-15 minutes, until the cheese is melted, bubbly, and slightly golden.
  • Serve hot as a side dish or a light main course.

Notes

This dish can be made with a variety of cheeses if desired, though switching cheeses may alter the carb count slightly.
Leftovers can be stored in an airtight container in the refrigerator for 1-2 days. Reheat in the microwave or oven before serving.
This recipe was inspired by Karen Niessing and further refined with suggestions from Kalyn’s Kitchen and Kalyn’s sister Pam.