Seafood Chowder (for a crowd!)

2 cups diced onions
10-12 potatoes, peeled and diced
10 pounds haddock
3 pounds peeled shrimp, raw
3 pounds scallops
5 cups cooked lobster meat, chopped
1 gallon heavy cream
2 sticks butter
Salt and pepper to taste

In a large saucepan with water two inches from the bottom, bring the onions and potatoes to a boil until the potatoes are slightly cooked. Add the haddock and stir until the fish just starts to flake apart. Turn down the heat to medium. Add the shrimp and scallops, and cook on medium heat until the scallops are done. Add the lobster meat, heavy cream, butter, and salt and pepper to taste. Cook on low until the butter melts. Do not boil. Yields 20 quarts.