01 -
Set the Instant Pot to sauté mode and heat the oil. Add chopped onion and cook, stirring occasionally, until softened, about 7-8 minutes.
02 -
Stir in minced garlic, dried tarragon, thyme, poultry seasoning, and black pepper. Cook while stirring frequently for 1 minute. Squeeze in some lemon juice and scrape the bottom to deglaze. Cancel sauté mode.
03 -
Add rinsed lentils, water, and salt to the pot. Stir thoroughly. Secure and lock the lid, setting the valve to sealed. Pressure cook on high for 8 minutes.
04 -
After cooking, carefully quick-release the pressure by turning the valve to venting. Remove the lid and allow the soup to rest for a few minutes.
05 -
Use an immersion blender to puree the soup until smooth and creamy. Taste and adjust salt, pepper, and lemon juice as needed. Serve hot.