Roast Beef Sliders with Caramelized Onions
Ingredients
- 6 Tbsp. butter, divided
- 2 sweet onions, sliced
- 1/4 cup brown sugar
- 2 tsp. Worcestershire sauce
- 1 Tbsp. onion flakes
- 1/4 cup mayonnaise
- 2 Tbsp. Coleman's mustard
- 1 Tbsp. honey
- 1 Tbsp. horseradish
- 24 brown 'n' serve rolls
- 1 lb. sliced roasted beef
- 1 lb. smoked white cheddar, sliced if you can find it, just shred it if you can't find it sliced