Step 1

In a large skillet, heat the oil over high heat.

Step 2

Sauté the onions and peppers until soft; reduce burner to medium heat.

Step 3

Add the ground beef and brown until it's no longer pink; drain excess grease.

Step 4

In a small bowl, combine the beef broth, bouillon, salt, pepper, garlic, Worcestershire and corn starch.

Step 5

Pour into the beef mixture and stir. Let boil for 5 minutes then remove from the heat.

Step 6

Stir the cheese into the beef mixture and serve on the prepared buns.