Colombian Beef Stew With Tomato Sauce / Estofado de Res

2 pounds beef stew meat<br />Salt and Black Pepper<br />¼ teaspoon ground cumin<br />2 tablespoons all purpose flour<br />2 tablespoons vegetable oil<br />1 cup chopped white onion<br />2 cloves garlic chopped<br />4 cups beef stock<br />1 14 oz can tomato sauce<br />2 bay leaves <br />2 cups carrots<br />2 cups potatoes