dairy free cheese slices, Follow Your Heart Gouda cheese works
Melt oil in large skillet over medium heat.
Once heated add sliced onions, bell peppers, salt, black pepper, and garlic to skillet. Saute until tender. Remove from skillet and set aside.
Add arrowroot powder to skillet and 2 tbsp of beef broth. Stir to make a paste.
Add gluten free Worcestershire sauce and remaining beef broth to skillet and bring to a boil.
Reduce heat and simmer for 15 minutes.
Toast bread in oven or toaster. If using rolls or baguette split with a knife. Preheat oven for cheese if using. For Udi's French Rolls or French Baguettes wrap each piece in aluminum foil and place on a baking tray in the oven.
Add sliced roast beef or ham to skillet and warm for 5 minutes.
Place sliced roast beef/ham mixture on bottom of bread. Top with onion and bell pepper slices. Cover with cheese and melt in oven for 5-8 minutes.
Place top bread slice on sandwich and serve with Au Jus in ramekins or small dipping bowl.