1 tablespoon olive oil |
1/2 cup diced celery (about 1 stalk) |
1/2 cup chopped red onion (about 1/2 small) |
1/3 cup diced carrot (about 4 medium) |
1 tablespoon minced garlic |
2 (8-ounce) packages sliced baby portobello mushrooms |
1 (28-ounce) can diced tomatoes with basil, garlic, and oregano, drained |
1 tablespoon grated fresh lemon rind |
1/4 teaspoon crushed red pepper |
1 (17-ounce) package prepared refrigerated basil and garlic-flavored polenta, cut into 12 slices (such as marjon) |
cooking spray |
2 tablespoons grated parmesan cheese |