Meaty Zucchini Ground Beef Casserole Easy Weeknight Dinner

Ingredients

• 2 lbs (900g) zucchini, sliced into 1/4-inch (6mm) thick rounds
• 1 small yellow onion, chopped
• 3 cloves garlic, minced
• 1 lb (450g) ground beef (85% lean recommended)
• 1 cup (115g) shredded mozzarella cheese
• 1/2 cup (50g) grated Parmesan cheese
• 2 tablespoons olive oil
• 1 (14 oz / 400g) can diced tomatoes, drained
• 1 cup (240ml) marinara sauce or pasta sauce
• 1 teaspoon dried oregano
• 1 teaspoon dried basil
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1/2 cup (50g) breadcrumbs (optional, for topping)