Zucchini with Parmesan

Copyright 2002 by Ina Garten

8 medium zucchini, halved lengthwise, then sliced diagonally in 1/2-inch slices
Good olive oil
2 large yellow onions cut in half and sliced 1/2 inch thick
Kosher salt
Freshly ground black pepper
1/2 cup freshly grated Parmesan cheese

Heat 2 tablespoons of olive oil in a large (12-inch) saute pan and add the onions. Cook for 10 minutes on medium-low heat, until they start to brown. Add half the zucchini, 1 teaspoon salt, and 1/4 teaspoon pepper to the pan and cook, tossing occasionally, for 10 to 15 minutes, until just cooked through. Sprinkle wit Parmesan and cook for 30 seconds more. Remove to a serving platter and repeat with the rest of the zucchini. Serve immediately.