1 1/2 pounds winter squash (preferably butternut) or sweet potato
peeled and cut into 1/4-inch-thick slices
Salt and freshly ground black pepper
1 1/2 pounds cod fillet
in 2 or 4 pieces
Flour for dusting
2 tablespoons balsamic or sherry vinegar
Instructions
Preheat oven to 400 degrees.
Melt half the butter in a small saucepan.
Put 2 tablespoons melted butter in a roasting pan and arrange squash slices in one layer on it.
Sprinkle with salt and pepper and drizzle remaining 2 tablespoons melted butter on top.
Roast without turning for 20 to 30 minutes, or until squash is tender; keep warm while you finish fish.
About 5 minutes before squash is done, put a heavy skillet over medium-high heat for about 2 minutes; add 2 tablespoons butter.
Dredge cod pieces lightly in flour and sprinkle with salt and pepper.
Add to skillet and turn heat to high; cook, turning only once, until nicely browned on both sides and cooked through (a thin-bladed knife will meet little or no resistance when fish is done).
Arrange squash slices on a platter, then top with fish.
Add remaining butter to skillet over medium heat; when it sizzles and browns, add vinegar and cook for 10 to 20 seconds more.