Black and Tan Beef Stew

3 medium potatoes, peeled and cubed
3 pounds beef stew meat
4 medium carrots, sliced
1 large onions, sliced
1 can tomato paste
3 14.5 cans beef broth
6 oz ale
6 oz stout
1 tablespoon sugar
1 tablespoon salt
1 teaspoon dried basil
1/2 teaspoon pepper

Brown meat in oil. Deglaze pan with onion. Put all ingredients in slow cooker on high for 6 hours.