Atkins Crock Pot Beef Stew

1/4 cup vegetable oil
2-3 lb. stew beef
1 onion sliced
2 garlic cloves minced
2 cups beef broth
1 bay leaf
Rosemary to taste
Salt/pepper to taste
1 carrot cut in 2 inch pieces
2 celery ribs cut in 2 inch pieces

Heat oil in skillet and brown beef. Place in bottom of crock pot. Add all ingredients but carrots and celery, cook low 6 hours. Add carrot and celery and cook 2-4 hours.