Prep - Divide ground beef into 4 patties. Salt both sides and set aside. Dice onion and drain canned green chile.
24 oz Ground beef, 8 oz Can chopped roasted green chiles, preferably Hatch, 1 medium Onion, diced
Cook onion and chile mixture - Heat oil in a skillet over medium-low heat. Cook onions until soft and lightly caramelized, about 15 minutes. Stir frequently. Stir in chile peppers and remove from heat.
2 tbsp Olive oil
Cook Cheeseburgers - Cook burgers on a hot grill or under the broiler for 2-3 minutes per side for a medium-rare to medium burger. In the last minute of cooking, top each burger with 2 tbsp of onion-chile mixture and 1 to 2 slices of cheese. Toast rolls slightly in a toaster or in the oven or on the grill..
8 slices Monterey Jack, Pepper Jack, or Muenster cheese
Assemble and Serve - Once cheese has melted, transfer burgers to the bottoms of the hamburger buns. Top with more onion-chile mixture and either add whatever fixin's you want before adding the top of the bun or serve separately for dinners to add their own.
4 large Hamburger buns (omit for gluten free), Salt and pepper, Optional toppings; ketchup, sliced tomato, lettuce and mayonnaise