If you are cooking in your Instant Pot, it does have a sauté option, but because I am sautéing the meat and veggies together, I still like to use a large skillet.
In your food processor, add the onion, carrots and celery and chop small.
In your skillet, add the olive oil, Italian Sausage, chopped vegetables and garlic.
Cook over medium-low heat until sausage is done and vegetables are soft; drain.
Pour meat and vegetables into the Instant Pot or into your slow-cooker.
Add the lentils and the broth.
Pour in the spices next.
Cover with the Instant Pot lid, set to seal, and press the Soup option; 30 minutes cooking time will appear.
If you’re using a slow-cooker, set it on low for 8 hours.
When the timer is clear, release the steam, open the lid and ladle soup into individual bowls.