Prepare your favorite mashed potato recipe. (Can also use rice or pasta).
Add a little olive oil (2 tablespoons) to a skillet and simmer peppers and onions on low heat till tender. If using fresh mushrooms, add about the last 5 minutes of cooking time. Add salt, pepper and granulated garlic. Heat together for about 5 min. Remove from pan.
Heat 3 c. of beef broth. Mix together 1 c of cold water mixed with 1/4 c of cornstarch (make sure all lumps are removed), add to hot broth with 1 tsp. of worcestshire sauce, 1/4 tsp black pepper, and 1/2 tsp. coarse sea salt. Add 1/4 tsp. of Kitchen Bouquet for a darker, richer, color. Simmer till thickened.
After gravy has thickened, return peppers and shredded beef back to gravy. Mix well. Serve over mashed potatoes, rice or pasta.