In your Instant Pot, hit Sauté and add oil. Stir occasionally as the chopped onion sweats in the instant pot for 3-5 minutes.
For 1–2 minutes, mix garlic, carrots, celery, and Yukon gold potatoes.Smashed tomatoes, lentils, vegetable stock, maple syrup, balsamic vinegar, bay leaf, paprika, Italian spice, and sea salt follow.
After 30 minutes, use the fast release valve to relieve pressure. Open Instant Pot lid and stir soup.
Soup with sea salt. Serve with crusty bread or homemade cornbread immediately! Lemon juice, olive oil, and Parmesan cheese brighten up lentil soup.