Mexican Lasagna

Name: Mexican Lasagna
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Cuisine: Mexican, American
Ingredients: 1 pound ground beef; 1 medium yellow onion (diced); 2 teaspoons minced garlic (2 cloves); 1/4 cup taco seasoning (2 packets); 1/2 cup water; 14.5 ounce fire roasted diced tomatoes (do not drain); 4 ounce green chiles (1 can); 15 ounce black beans (1 can, drained and rinsed); 18 corn tortillas (divided); 6 cups shredded jack and cheddar cheese (divided); 1 medium tomato (1-2 tomatoes diced for garnish); 1 bunch green onions (sliced for garnish); sour cream (for serving)