Heat a large heavy duty skillet to medium/high heat. Add the chopped onions, peppers and 1 teaspoon olive oil. saute for 3-4 minutes or until they are soft. Pour into a smaller bowl and set aside. In the same skillet add the beef and brown ( 3-4 minutes), drain fat and set aside.
Return the veggies into the skillet and combine. Add the steak sauce, and seasonings. In a small bowl Whisk cornstarch into beef broth and add to the beef mixture. Simmer for 8-10 minutes, stirring occasionally, until most of the liquid is absorbed.
After you have turned off the heat Top with 3-4 slices of cheese and allow to melt.Toast hamburger buns and scoop mixture into the buns. Serve this sandwich alone or with a side of my homemade nacho cheese fries. Serve warm and enjoy!