Braised Onion Sauce

• 1/2 cup butter
• 1 1/2 pounds yellow onions, sliced about 1/4- to 3/8-inch thick
• 1 tablespoon sugar
• 1/4 cup Madeira wine
• Parmesan cheese

Melt the butter in a skillet; add the onion. Cook, covered, over medium heat until soft and transparent. Uncover, stir in the sugar and reduce the heat; cook gently until brown, about 1 hour. Stir in the Madeira and cook 2 minutes longer.
Toss the sauce with drained, cooked pasta. Serve immediately with grated Parmesan cheese.
Serves 4.
Recipe adapted from "The New James Beard"