Garden Minestrone

INGREDIENTS

• 2 teaspoons olive oil
• 1 cup chopped onion
• 2 teaspoons chopped fresh oregano
• 4 garlic cloves, minced
• 3 cups chopped yellow squash
• 3 cups chopped zucchini
• 1 cup chopped carrot
• 1 cup fresh corn kernels (about 2 ears)
• 4 cups chopped tomato, divided
• 3 (14-ounce) cans fat-free, less-sodium chicken broth, divided
• 1/2 cup uncooked ditalini pasta (very short tube-shaped macaroni)
• 1 (15.5-ounce) can Great Northern beans, rinsed and drained
• 1 (6-ounce) package fresh baby spinach
• 3/4 teaspoon salt
• 1/2 teaspoon freshly ground black pepper
• 1 cup (4 ounces) grated Asiago cheese
• Coarsely ground black pepper (optional)