Prep your ingredients by chopping the onion, mincing garlic, preparing chili paste, chopping vegetables, cutting chicken, and zesting and juicing the lemon.
Using the 'Sauté' function, cook onions and garlic in the Instant Pot with olive oil.
Add chili paste, carrots, and celery, and continue sautéing.
Stir in chicken pieces and cook until lightly browned.
Incorporate potatoes, broth, and thyme, and season the stew.
Pressure cook on high for 15 minutes and quick release pressure.
Combine sour cream and flour, then stir into the stew to thicken.
Mix in kale and lemon juice, cooking until kale is tender.
Taste, adjust seasoning, and serve.