Heat oven to 375°f. Spray 13*9 inch pan with nonstick cooking spray.

Slice chiles; remove seeds and stems. Open chiles completely so they lie flat. In pan, layer chiles and cbeeses, starting with light layer of cheese and ending with cheese (3 layers cheese, 2 layers chiles).

In medium bowl, beat eggs, milk and flour at medium speed until well blended. Pour egg mixture over chiles and cheese. Bake 1 hour or until firm. Cut into small squares. Serve warm.