Heat oil in pressure cooker. Add onions, garlic, carrots and celery. Saute until onions are softened and lightly browned, about 3-4 minutes. Add chili powder, cumin, coriander, oregano, mustard, and cayenne (if you like a little heat) and stir well for a minute or two. Add tomatoes, lentils, broth, salt to taste, and pepper. Pressure cook for 14 minutes or until lentils are tender.
Select "Saute" setting on Instant Pot. Add oil and let heat up. Add onions, garlic, carrots and celery. Saute until onions are softened and lightly browned, about 4 minutes. Add chili powder, cumin, coriander, oregano, mustard and cayenne (if you like some heat) and stir well for a minute or two. Add tomatoes, lentils, broth, salt to taste, and pepper.
Select "Cancel," then close the lid. Turn steam release handle to "Sealing" position. Select "Bean/Chili" and set time for 14 minutes (note: if you use red lentils, cooking time will be less ~ 7-8 minutes). Press "Cancel" and let Instant Pot naturally release pressure until float valve drops down and lid unlocks; alternatively, press "Cancel" and let Instant Pot naturally release for 10 minutes; then turn steam release valve to "Venting" until float valve drops down and lid unlocks.
You may want to add more broth or water after cooking to thin the chili depending on the type of lentils you use. I've used sprouted lentils, as well as a combination of French green lentils and brown lentils, and found 3 cups of broth to be sufficient.
1 Freestyle point per serving.