INGREDIENTS
1 tbsp
olive oil
1
small yellow onion (diced into 1/2" pieces, about 1 cup)
1
large green bell pepper (diced into 1/2" pieces, about 1 1/2 cups)
8 oz
white button or crimini mushrooms (sliced (optional))
1/4 tsp
kosher salt
1/4 tsp
freshly ground black pepper
1 1/2 lb
ground beef
3/4 cup
beef broth
1 tbsp
cornstarch
3 tbsp
ketchup
3 tbsp
Worcestershire sauce
1 tbsp
Mexican Spice Mix or taco seasoning
8 oz
shredded Provolone or Monterey Jack cheese (about 2 cups)
6
hamburger buns