Instant Pot Vegetarian Minestrone Soup

Name: Instant Pot Vegetarian Minestrone Soup
Ingredients: 1 tablespoon extra virgin olive oil; 1 medium onion, chopped; 1 large carrot, chopped into 1/2 thick pieces; 1 large parsnip, peeled and chopped into 1/2 thick pieces; 1 stalk celery, chopped into 1/2 thick pieces; 3 cloves garlic, minced; 1 zucchini, chopped into 1/2 thick pieces; 1 russet potato, peeled and chopped into 1 chunks; (2) 15 ounce cans low sodium diced tomatoes; 8 cups Easy Homemade Vegetable Stock or store bought low sodium vegetable stock; 1/2 cup uncooked whole wheat pasta shells; 8 ounces green beans, trimmed and cut into 1 pieces; 15 ounce can low sodium kidney beans, rinsed and drained; 1 bay leaf; 1 large sprig fresh thyme or 1 teaspoon dried; 1 tablespoon freshly chopped rosemary or 1 teaspoon dried; 3 cups fresh baby spinach; 2 tablespoons fresh lemon juice; Salt and freshly ground black pepper, to taste; Freshly grated parmesan, for serving (optional)