In A Bowl, Combine The Beans, 2 Tablespoons Green Chilies, Onion And Salt. Crumble The Beef Over Mixture And Mix Well. Shape Into Eight 5-In. Patties. Top Each Patty With 2 Tablespoons Cheddar Cheese; Fold In Half And Press Edges To Seal, Forming A Half Moon. If Grilling The Burgers, Coat Grill Rack With Nonstick Cooking Spray Before Starting The Grill. Grill Burgers, Uncovered, Over Medium Heat Or Broil 4 In. From The Heat For 7-9 Minutes On Each Side Or Until Meat Is No Longer Pink And A Meat Thermometer Reads 160 Degrees F. Serve On Tortillas With Lettuce, Tomato, Salsa And Remaining Chilies.