Beef Enchilada Casserole

Bahan-bahan (6 porsi)

• 10 small corn tortillas (6-inch, or flour tortillas)
• 1 tablespoon olive oil
• 1 pound lean ground beef
• 1 tablespoon taco seasoning
• salt and pepper to taste
• 15 ounces canned pinto beans (rinsed and drained, 1 can)
• 2 cups red enchilada sauce
• 2 ½ cups shredded cheddar cheese
• 2 ripe tomatoes (diced)
• ¼ cup sliced green onions