Corned Salmon And Savoy Cabbage

Ingredients

• 1 leek, halved lengthwise and rinsed
• 2 tablespoons unsalted butter
• 2 tablespoons water
• salt and pepper, to taste
• 2 small heads green savoy cabbage, stemmed
• 3 freshly ground green cardamom pods (optional)
• 1 1/2 pound fingerling, ozette, or ruby crescent potatoes
• 2 sprigs thyme
• 1 bunch flat-leaf parsley, stemmed
• 1 bunch tarragon, stemmed
• 1 bunch dill, stemmed
• 1 bunch chives
• 1 ice cube
• 6 tablespoons unsalted butter, cut into 6 equal pieces
• 1/4 cup kosher salt
• 2 tablespoons brown sugar
• 4 tablespoons coriander seeds, toasted
• 2 tablespoons cracked black pepper
• 2 large fresh bay leaves, chopped roughly
• 4 large cloves garlic, sliced thinly
• four 7-ounce skin-on salmon fillets, preferably from the thicker end (head end) of the fish
• 3 tablespoons grapeseed oil