Ingredients:
For the Zucchini Base
4 C. shredded zucchini, about 3 medium zucchini
2 t. salt
4 large eggs
1⅓ C. Parmesan cheese, grated
3 C. cheddar cheese, shredded
For the Beef Filling
1½ T. olive oil
1½ lb. lean ground beef
¾ C. yellow onion, chopped
2 C. sliced fresh mushrooms
½ C. diced bell pepper
1 jar marinara or pasta sauce, 23 ounces
Salt and black pepper, to taste
For the Topping
1½ C. shredded cheddar cheese
Chopped fresh parsley (optional)
Directions:
- Preheat the oven to 400°F.
- Lightly grease a 9×13-inch baking dish.
- Prepare the zucchini: place the shredded zucchini in a colander, sprinkle with the 2 teaspoons of salt and let it rest for 15 minutes to draw out excess moisture.
- Transfer the zucchini to a clean kitchen towel or several layers of paper towels and squeeze very thoroughly until as dry as possible.
- In a large bowl, whisk the 4 eggs with the grated Parmesan and 3 cups of shredded cheddar.
- Fold the drained zucchini into the egg-and-cheese mixture until evenly combined.
- Press the zucchini mixture evenly into the prepared baking dish to form a compact layer.
- Bake uncovered for 25 minutes, or until the base is set and lightly golden around the edges.
- While the zucchini base bakes, heat the olive oil in a large skillet over medium-high heat.
- Add the chopped onion and sliced mushrooms to the skillet and cook 4–5 minutes, stirring occasionally, until softened.
- Add the ground beef and diced bell pepper. Break the beef into crumbles and cook until fully browned and the pepper is tender.
- Drain any excess grease from the pan.
- Stir the marinara sauce and Italian seasoning into the browned beef.
- Season with salt and black pepper to taste and simmer for about 5 minutes to meld flavors.
- Remove the zucchini base from the oven and spread the beef-and-sauce mixture evenly over it.
- Evenly sprinkle the remaining 1½ cups of shredded cheddar cheese over the beef layer.
- Return the casserole to the oven and bake 8–10 minutes, or until the cheese is melted, bubbly, and lightly golden.
- Let the casserole rest for 10 minutes before slicing to allow the layers to set. Garnish with chopped fresh parsley, if desired, and serve warm.