Beef Burrito Casserole

Bahan-bahan (8 porsi)

• 16 ounces ground beef
• 1 small onion, (chopped)
• 2 cloves garlic, (minced)
• ½ teaspoon dried oregano
• ½ teaspoon ground cumin
• One 14-ounce can chili beans, (drained)
• 1 cup bottled chunky salsa
• ⅓ cup grated Parmesan cheese
• Eight 8-inch flour tortillas
• 2 cups shredded Cheddar Jack cheese
• 3 whole green onions, (chopped)
• sour cream, salsa and avocado for serving ((optional))