Egg and Cheese Casserole with Feta, Spinach, Mushrooms, Peppers, and Tomatoes
Recipe type: Breakfast
Prep time: 
Cook time: 
Total time: 
Serves: 10 servings
  • 3 tablespoons olive oil, divided
  • 1 small red onion, cut in half vertically and thinly sliced
  • 6 ounces (170 g) fresh baby spinach leaves
  • 2 medium zucchini or yellow summer squash, thinly sliced
  • 2 cups diced red potatoes or sweet potatoes, about 3 to 4 medium
  • 1 medium bell pepper, finely chopped
  • 8 ounces (226 g) sliced mushrooms
  • 9 large eggs, whisked
  • 1-1/2 (228 g) cups crumbled Feta cheese
  • 1/2 cup (120 ml) low-fat milk
  • 16 ounces (454 g) carton low-fat cottage cheese
  • 1/2 cup (20 g) chopped fresh parsley
  • 1/4 teaspoon black pepper
  • 1/4 teaspoon sea salt
  • 3/4 cup (85 g) grated sharp cheddar cheese
  • 2 medium tomatoes, thinly sliced
  1. Preheat the oven to 400° F/200° C.
  2. Heat 1 tablespoon of the olive oil in the nonstick skillet, then sauté the red onion over medium heat. Add all the spinach and cover with the lid. Allow to sweat until the spinach starts to shrink, about 5 minutes, then uncover and stir. Continue stirring until the spinach is all softened and limp, about 3 more minutes. Drain off any liquid and transfer the spinach mixture to the prepared casserole dish.
  3. Heat the remaining olive oil in the skillet, and add the potatoes, zucchini, mushrooms, and bell pepper. Sauté over medium heat until all the vegetables have softened, about 5 to 7 minutes. Drain off any excess liquid.
  4. In the large mixing bowl, whisk together the eggs, Feta cheese, milk, cottage cheese, parsley, salt, and pepper. Stir in the potato and zucchini mixture. Pour over the spinach in the casserole dish. Sprinkle sharp cheddar cheese all over the top, then lay the tomato slices on top of the cheese.
  5. Bake in the preheated oven for 15 minutes. Reduce the heat to 350° F/175° C and continue baking until the casserole is lightly browned and just set, about 35 minutes. Remove from the oven and allow to cool about 5 minutes or so, then serve.
More Information

large nonstick skillet with lid
3-quart casserole dish, lightly coated with cooking spray
large mixing bowl

Recipe Notes

Remember to drain off any liquids before putting vegetables in the casserole dish, otherwise the quiche will turn out runny. The spinach and zucchini will be the most likely culprits.
Recipe by Andrea Meyers at