Open-Face Patty Melts

Directions

1. 1
   Heat dressing in large nonstick skillet on medium-high heat.
2. 2
   Add onions; cook 2 min. Stir onions and move to one side of skillet.
3. 3
   Add patties to other side of skillet; cook on medium heat 10 min. or until burgers are done (160F), flipping burgers and stirring onions after 5 min.
4. 4
   Top burgers with VELVEETA; cover. Cook 1 to 1-1/2 min. or until VELVEETA is melted; place on toast slices. Top with onions.