BASIC POT ROAST This is probably one of the first, and best, one-pot meals. The keys to this recipe are browning the meat and mixing the essence into the au jus.    Preparation: 15 min.   Cooking: 1 hr. 45 min.   Ingredients: 2 lb boneless beef chuck arm roast (trim) 1 teaspoon canola oil 1 medium onion, chopped 2 garlic cloves, minced  4 1/2 cups water  2 bay leaves  1 teaspoon ground black pepper 6...