2 tablespoons vegetable oil
1 onion, thinly sliced
4 (6-ounce) frozen pre-formed burgers (see Notes)
4 slices cheddar cheese
1/2 cup mayonnaise (see Notes)
4 Kaiser rolls, cut in half
4 pieces leaf lettuce
4 slices tomato
1/4 cup sliced pickles
8 slices crispy cooked bacon
Directions1. Preheat grill to medium-high heat.
2. In a large skillet over medium heat on your stovetop, heat oil until hot; saute onion 10 to 15 minutes or until caramelized, stirring occasionally.
3. Meanwhile, cook burgers on your grill 5 to 6 minutes per side or to desired doneness (145 degrees).
4. Place a slice of cheese on top of each burger, close the top of the grill, and continue to cook until the cheese melts.
5. Spread mayonnaise on each roll half, layer bottom of rolls each with lettuce, tomato, caramelized onion, burger, pickles, and bacon. Finish it off with the top of the bun. Serve immediately.