Beef Soup with Root Vegetables

Name: Beef Soup with Root Vegetables
Ingredients: 1 pound boneless beef round steak; 2 tablespoons olive oil; 2 stalks celery, sliced; 1 large onion, coarsely chopped; 1 medium carrot, sliced; 2 cloves garlic, minced; 2 (14 ounce) cans beef broth; 1 cup water; 2 sprigs fresh thyme; 1 bay leaf; 2 medium potatoes, peeled and cut into 3/4-inch cubes; 2 medium turnips, peeled and cut into 3/4-inch cubes; 1 large sweet potato, peeled and cut into 3/4-inch cubes; 6 Flat crackers or crusty Italian bread