Baked Zucchini Parmesan Casserole

Ingredients

• 4 medium zucchinis, sliced
• 1 teaspoon salt
• 1 tablespoon olive oil
• 1 small onion, finely chopped
• 2 cloves garlic, minced
• 1 can (14 oz) crushed tomatoes
• 1 teaspoon dried basil
• 1 teaspoon dried oregano
• 1/4 teaspoon red pepper flakes (optional)
• 1 cup grated Parmesan cheese, divided
• 1 1/2 cups shredded mozzarella cheese, divided
• 1 cup panko breadcrumbs
• 1/4 cup chopped fresh parsley