Instant Pot Italian Wedding Soup

Ingredients

• 1 tbsp olive oil
• 1 ½ cups carrots, chopped
• 1 cup celery, sliced
• ½ cup red onion, diced
• 1 tsp dried parsley
• ¼ tsp dried basil
• ¼ tsp ground black pepper
• 6 cups chicken broth (no-salt-added)
• 20 Italian meatballs (preferably homemade)
• ½ cup pastina pasta
• 6 oz baby spinach
• Salt, to taste
• 4 tsp grated Parmesan cheese