2 teaspoons olive oil |
3 cups thinly sliced vidalia or other sweet onion (about 12 ounces) |
6 cups coarsely chopped radicchio (about 8 ounces) or escarole |
1/2 teaspoon salt |
2 garlic cloves, minced |
1 tablespoon balsamic vinegar |
1/4 teaspoon black pepper |
1/2 recipe whole-wheat pizza dough |
cooking spray |
1 tablespoon yellow cornmeal |
1/2 cup (2 ounces) shredded part-skim mozzarella cheese |
1/4 cup part-skim ricotta cheese |