Oil square glass dish and put in: 1/3 cheese, 1/2 chilies, 1/3 cheese, 1/2 chilies, 1/2 cheese.
Beat 2 eggs and mix with 1 cup evaporated milk and 2 tablespoons flour.
Pour over above and bake 35 minutes. Remove from oven and sprinkle with oregano. Pour 1 can tomato sauce over all and poke top; with fork. Bake 10 minutes more.
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