2 lbs. fresh, peeled, and deheaded shrimp
1/4 lb. butter (or 3 tbsp. oil)
1 c. finely chopped onion
1/2 c. finely chopped celery
1/2 c. finely chopped bell pepper
4 cloves minced garlic
Salt and pepper
Cayenne
1 tbsp. cornstarch
1 1/2 c. water