INGREDIENTS
1 1/2
lbs Ground beef
3
Vidalia onions, medium
1 tbsp
Barbecue sauce
1/4 cup
Dijon mustard
1/2 tsp
Hot sauce
1/4 cup
Mayonnaise
1/2 cup
Secret sauce
1
Secret sauce
2 tsp
Worcestershire sauce
1/2 tsp
Black pepper, ground
1 tsp
Kosher salt
12
slices Sourdough bread
8 tbsp
Butter, unsalted
6
slices Cheddar cheese