Instant Pot Minestrone Soup

Name: Instant Pot Minestrone Soup
Ingredients: 1 teaspoon avocado or olive oil; 1 large yellow onion, diced; 4 cloves garlic, minced; 2 cups 1/2-inch chopped carrots; 2 cups 1/2-inch chopped celery; 2 1/2 cups 1/2-inch diced butternut squash; 1 (26 oz.) box crushed or diced tomatoes (such as Pomi); 32 oz. vegetable broth; 2 (15 oz.) cans white beans, drained and rinsed; 1 cup shell pasta (or bowties); 1 tablespoon chopped fresh thyme; 2 sprigs fresh rosemary, chopped; 1 tablespoon dried oregano; 5 oz. baby spinach; salt and pepper to taste; fresh parsley; 1/2 cup fresh pesto (store bought or homemade)