1 pound halibut, skinned and cut into large pieces
1 pound bass, skinned and cut into large pieces
1 pound cod, skinned and cut into large pieces
1 Dungeness crab, optional, cooked and shelled
1 onion, sliced
2 leeks, white part only, sliced
4 garlic cloves, peeled
2 potatoes, peeled and sliced
Bouquet garni: parsley sprigs, bay leaf, thyme, slice of orange peel, tied together with kitchen string
Salt and pepper

For aioli:
4 cloves garlic, peeled and crushed
6 egg yolks, at room temperature
1 cup vegetable oil
1 teaspoon lemon juice
1 Tablespoon mixture of fresh chopped parsley, chervil, chives and tarragon