INGREDIENTS
1/3 cup
vegetable oil
1/2 cup
soy sauce
1/4 cup
lemon juice
1 tbsp
prepared mustard
1 tbsp
Worcestershire sauce
1 clove
garlic, minced
1 tsp
coarsely cracked black pepper
1 1/2 tsp
salt
1 1/2 lb
lean beef, cut into 1-inch cubes
16
mushroom caps
8
metal skewers, or as needed
2
green bell peppers, cut into chunks
1
red bell pepper, cut into chunks
1
large onion, cut into large squares