onion - 2 (large)
shallots - watch the video to see
leeks - watch the video to see (white and light green parts only)
salt - watch the video to see (to taste)
corn starch - 1 teaspoon (for crispy leeks)
butter - 2 oz
olive oil - 1 tablespoon (as needed)
fresh thyme - 2 teaspoons
garlic - 1 tablespoon (chopped)
flour - 2 oz
white wine - 2 cups
aged balsamic vinegar - 2 tablespoons (18 years old preferred)
brown sugar - 1 tablespoon (if using young balsamic vinegar)
cherry wine - 2 tablespoons (Bristol cream or similar)
port wine - 2 tablespoons
chicken stock - 12 oz
beef stock - 12 oz
heavy whipping cream - watch the video to see
Gruyère cheese - watch the video to see
Parmesan cheese - watch the video to see (Parmigiano Reggiano recommended)
pasta - 1 pound (any type, cooked as per package instructions)
parsley - watch the video to see (fresh, for garnish)