Instant Pot Lentil Soup

Ingredients

• large onion, chopped
• medium carrot, peeled and chopped
• stalks celery, chopped
• garlic, minced
• c. green lentils
• can diced tomatoes
• fresh thyme
• Italian seasoning
• Kosher salt
• Freshly ground black pepper
• c. low-sodium chicken or vegetable broth
• c. baby spinach
• Freshly grated Parmesan, for serving