Cheesy Beef and Pasta Casserole

Bahan-bahan (6 porsi)

• 1 teaspoon olive oil
• 1 medium onion, (chopped)
• 1 large zucchini, (chopped)
• 2 medium garlic cloves, (minced)
• ¼ teaspoon red pepper flakes
• ¾ pound lean ground beef ((7% fat or less))
• 4 cups cooked whole wheat penne ((about 2¼ cups dry))
• 2 cups low fat marinara sauce ((2g fat or less))
• 1 cup shredded part skim mozzarella cheese, (divided)
• 2 tablespoons chopped fresh basil