Leftover Mississippi Pot Roast Stew

Name: Leftover Mississippi Pot Roast Stew
Cuisine: American
Ingredients: 6 ounces {or more} of leftover Mississippi Pot Roast; All the juices and floaty bits of the leftover Mississippi Pot Roast; 8 cups of water; 2 cups dried small Navy beans {if simmering all day} or 1 -2 cans Navy beans, drained if you want dinner on the table quicker; 2 carrots, chopped; 1 cup frozen peas; 1 cup frozen spinach; 2-3 Yukon Gold potatoes, chopped; A little fresh cracked pepper