French Dip Sandwiches

adapted from Dinner's Ready

1 pot roast, anywhere from 2 to 4 pounds
1 green pepper, sliced
1 red bell pepper, sliced
1 medium onion, sliced
mozzarella slices
1 McCormick Au Jus sauce packet (found in the gravy mix aisle)
Rolls /buns

In crockpot, dissolve Au jus packet in 3 cups of cold water then add the roast. Cook on low for 6-8 hours or high for 4-5 hours (I cooked mine about 8 hours on low before adding the peppers and onion for another hour). One hour before you plan to eat, shred the beef then slice the peppers and onions and add to crockpot. When it is finished, remove meat and veggies with a slotted spoon. Place mozzarella slices on buns and put under low broil until cheese is melted and lightly browned. Fill the rolls with the meat and veggies, then divide the Au Jus sauce into smaller bowls for dipping.