INGREDIENTS
1 lb
ground beef (I use 80/20, lean/fat ratio)
2 tbsp
butter
1
medium yellow onion (diced)
1
green bell pepper (stems & seed removed, diced)
1/2 lb
brown mushrooms (minced)
1 tbsp
cornstarch
1 cup
beef broth
1 tsp
cider vinegar
2 tbsp
ketchup
2 tbsp
Worcestershire Sauce
1/2 tsp
kosher salt
1/2 tsp
freshly ground black pepper
1/4 tsp
red pepper flakes (optional)
2 tbsp
Velveeta
4
slices Provolone cheese (depending how cheesy you want)
6
ciabatta rolls