Spicy Shrimp with stalks

2 lbs. medium shrimp 2 tbs.'s olive oil 1 onion , chopped 1 green bell pepper , chopped 1/2 red bell pepper , chopped 2 stalks celery , chopped 2 tsp.'s[...]

1 1/2 pints chicken broth , canned (or home-made) 1 large russet potato , peeled and chopped 1 large sweet potato , peeled and chopped 1 medium white onion,[...]