1/4 cup vegetable oil
2 medium-sized onions, thinly sliced
1 to 1-1/4 pounds ground beef
1/4 cup ranch dressing
1/4 cup crushed tortilla chips
1/4 teaspoon salt
1/8 teaspoon black pepper
4 slices jalapeno cheese
1 large tomato, sliced
1. In a large skillet, heat oil over medium-high heat. Add onions, and saute 12 to 15 minutes, or until browned. Remove from heat, cover, and set aside.
2. Preheat grill to medium-high heat.
3. In a medium bowl, combine ground beef, ranch dressing, crushed tortilla chips, salt, and pepper; mix well. Divide the mixture into 4 equal amounts and make 4 patties. Grill patties 8 to 12 minutes, or until juices run clear, turning them over halfway through cooking.
4. Place a slice of jalapeno cheese on each burger 2 minutes before removing burgers from the grill. When cheese is melted, remove burgers from grill, top each with a tomato slice and sauted onions.