More Vegetable-Than-Egg Frittata

2 Tablespoons olive oil
1/2 onion, sliced
4 cups mixed vegetables (zucchini, yellow squash, mushrooms, spinach, asparaghus, etc.)
1 teaspoon salt
1/4 cup fresh basil leaves
3 eggs
1/2 cup grated Parmesan cheese

1. Put 1 Tablespoon of the oil in 12" nonstick skillet over medium heat. when hot, add onion and cook until soft, about 3 minutes. Add vegetables and 1/4 teaspoon salt. Raise heat to medium high and cook, stirring occasionally, until softened, about 10 minutes. Adjust heat as necessary so vegetables brown a little without scorching.

2. Turn heat to low when vegetables are nearly done and add basil. Cook, stirring occasionally, until pan is almost dry, up to 5 minutes loger for wetter ingredients such as mushrooms.

3. Beat eggs and cheese in bowl while vegetables cook. Season with remaining 3/4 teaspoons salt and freshly ground black pepper. Add remaining 1 Tablespoon oil to pan. Pour in eggs, using a spoon if necessary to distribute them evenly. Cook, undisturbed, until eggs are barely set, about 10 minutes. Run under the broiler for a minute or two to brown very slightly.

4. Cut into wedges and serve hot, warm or at room temperature.