| 1 pound eggplant, peeled and cut into 1-inch cubes |
| 1 large red onion, cut into 1-inch pieces |
| 2 medium sweet yellow peppers, cut into 1-inch pieces |
| 1 tablespoon olive oil or canola oil |
| 1 1/2 cups chopped onions |
| 2 teaspoons olive oil or canola oil |
| 1/2 teaspoon crushed red pepper flakes |
| 1/2 teaspoon fennel seeds, crushed |
| 1 can (28 ounces) crushed tomatoes |
| 1 can (14 1/2 ounces) diced tomatoes, undrained |
| 1/4 cup minced fresh parsley |
| 1 package (16 ounces) ziti or other small tube pasta |
| 4 cups chopped fresh spinach |
| 1 cup (4 ounces) shredded part-skim mozzarella cheese |