Chili Relleno Casserole

1 sweet onion, diced
2 cloves garlic, minced
8 eggs
½ cup milk
2 T. all purpose flour
½ tsp. pepper
½ tsp. salt
½ tsp. ground cumin
3 7-ounce cans whole green chilies, split open and cut into strips
5 corn tortillas, torn into strips
1 pound shredded Monterey Jack cheese
paprika

Lightly grease 9x9-inch glass baking dish. Heat a small amount of oil in a skillet on medium, and saute onions and garlic until onions are lightly browned. Remove from heat and set aside. Beat eggs with milk, flour, pepper, salt, and cumin in a medium bowl to blend. Arrange chilies from 1 can in prepared dish, covering bottom completely. Cover with strips of tortilla, then sauteed onion mixture. Sprinkle with approximately ⅓ of the cheese. Repeat layering twice. Pour egg mixture over the top. Sprinkle with paprika. Let stand 30 minutes. (Can be prepared 1 day ahead. Cover and refrigerate.)

Preheat oven to 350°F. Bake until casserole is mostly set, slightly puffed in center and golden brown on edges, about 45 minutes. Cool 10 minutes and serve.

Modified from this epicurious post, incorporating various comments and updates.