Smashing Good Burger

Directions

1. 1
   Preheat greased grill to medium-high heat.
2. 2
   Shape meat into four 1/2-inch-thick oval patties; set aside.
3. 3
   Melt butter in small skillet on medium heat.
4. 4
   Add mushrooms and onions; cook and stir 4 min.
5. 5
   Stir in 1/2 cup of the barbecue sauce.
6. 6
   Reduce heat to low; simmer 5 min.
7. 7
   or until heated through, stirring occasionally.
8. 8
   Meanwhile, grill patties 8 min., turning after 4 min.
9. 9
   Brush with remaining 1/4 cup barbecue sauce.
10. 10
    Top evenly with potatoes.
11. 11
    Grill an additional 2 min.
12. 12
    Serve topped with the mushroom mixture.