Heat the oven. Prepare a casserole dish with pan release spray; set aside. (Mine is a 2 qt round one. A 9"x13" would be too large.) Put the canned chili in a saucepan to heat on low for topping the frittata. Grated the cheese (1-1/2 C, divided use) and set handily by. Slice the spring onions; put them in the casserole dish. Add the corn, being sure it is well-drained. Cut the tamales into 8 pieces each, and arrange them evenly in the casserole dish on top of the corn and spring onions. Beat the eggs together with the Half N Half and seasonings. Pour the beaten eggs over the other ingredients in the casserole; top with 1 C of grated cheddar. Bake as directed. About 10 minutes before the casserole is done, heat the canned chili for topping. To serve: cut into serving size pieces, top with chili and more cheese.