Supper with Stella

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