3/4 pound fresh cod
Kosher salt
1 bay leaf
1/2 teaspoons peppercorns
1 sprig thyme
Pinch cayenne pepper
1/2 onion
5 cloves garlic
3 cups milk
1/4 pound baking potatoes, like russets
1/4 pound waxy potatoes, like Yukon Golds
1/4 cup extra virgin olive oil
2 stalks green garlic or 2 cloves garlic