Crawfish (or shrimp) Etouffee

1 lb crawfish or shrimp
2 sticks butter
1-2 bunches chopped green onion
1 can Rotel
2 cans cream of mushroom
1/2 cup chopped onion
1/2 cup chopped green pepper
salt, garlic, parsley and pepper to taste
cooked rice

Saute' onions and meat in melted butter. Add tomatoes, soups and seasonings. Let simmer for 10 minutes. Serve over rice.