Spaghetti Squash Meatball Casserole (Diabetes Healthy)

Ingredients

• 1 medium spaghetti squash (about 4 pounds)
• 1/2 teaspoon salt, divided
• 1/2 teaspoon fennel seed
• 1/4 teaspoon ground coriander
• 1/4 teaspoon dried basil
• 1/4 teaspoon dried oregano
• 1 pound lean ground beef (90% lean)
• 2 teaspoons olive oil
• 1 medium onion, chopped
• 1 garlic clove, minced
• 2 cups chopped collard greens
• 1 cup chopped fresh spinach
• 1 cup reduced-fat ricotta cheese
• 2 plum tomatoes, chopped
• 1 cup pasta sauce
• 1 cup shredded part-skim mozzarella cheese