EASY PORK SHOULDER ROAST WITH PEARL ONIONS AND MUSHROOM GRAVY

3 lb. pork shoulder roast, seasoned and stuffed with garlic Flour Olive oil 2 shallots, thinly sliced 6 red pearl onions, peeled (left whole) 6 white pearl onions, peeled (left whole) 8-10 mini multi colored peppers, sliced into rings 1…