1.Preheat The Oven To 350 Degrees F (175 Degrees C). 2.Grate The Luncheon Meat In To A Medium Bowl Using A Cheese Grater. Stir In The Chili And Cheddar Cheese. Spread The Mixture Onto Each Bun Half Using A Fork, And Place Them On A Baking Sheet. 3.Bake For 8 To 10 Minutes In The Preheated Oven, Until Heated Through And Buns Are Nicely Toasted On The Bottom.