Brown the chicken: Melt 1 tbsp butter or coconut oil in a large heavy-bottomed skillet over medium heat. Brown chicken in batches until deep golden. Season with salt and pepper, then set aside.
Sauté the onion: Add more butter if needed. Cook chopped onion until soft and translucent. Season lightly.
Toast aromatics: Add garlic, fresh ginger, and spices. Cook, stirring constantly, about 1 minute until fragrant.
Blend the base: Transfer mixture to a medium heavy-bottomed pot. Add 1 cup of bone broth and blend with a stick blender until smooth.
Add main ingredients: Stir in potatoes, red lentils, and remaining bone broth. Bring to a gentle simmer over medium heat.
Cook the stew: Add browned chicken pieces and simmer 20–25 minutes, until potatoes are tender and chicken is cooked through. NOTE: If using cubed chicken breast, simmer stew base 15 minutes until potatoes are soft, then add chicken and cook 6–8 minutes more.
Finish: Turn off heat and stir in cream. Taste and adjust salt. Rest 5–10 minutes.
Serve: Garnish with fresh cilantro, parsley, or green onions, and a squeeze of lemon juice.