INGREDIENTS
2
lbs 85/15 ground sirloin
8
Crispy cooked bacon strips
1 cup
Cremini mushrooms
1 cup
Domestic mushrooms
2
Sweet onions
1
Soy sauce
1
Tabasco
1
Worcestershire
1
Kosher salt and cracked black pepper
1 tsp
Sugar
2 tbsp
Olive oil
4
Brioche buns, toasted
1
Onion rings, cooked
1
Blue cheese crumbles
1 tsp
Butter, unsalted
8
slices Mozzarella cheese