Sweet Potato & Ham Chowder

1 chopped celery rib
2 Tbs butter
2 cans chick broth
2 cups water
2 tsp bullion gran
4 med potatoes, peeled and cubed
1 lg sweet potato, peeled and cubed
2 Cups turkey ham or regular ham cubed and cooked
2 Tbs minced dried onion
¼ tsp pepper
¼ tsp crushed red pepper flakes
2 Cups milk
¼ cup flour

In lg saucepan, sauté celery in butter until clear. Stir in broth, water and bullion. Add potatoes, ham & seasonings. Bring to boil. Reduce heat, cover and simmer 12 min or until potatoes are tender. Combine milk and flour until smooth; gradually stir into soup. Bring to boil. Cook and stir for 2 more minutes until thick & bubbly.