Heat 1 tbsp coconut oil in large pan or dutch oven. Add chopped onions and cook until transparent and browning.
Add potatoes, garlic, and lentils, saute for 1 minute or until garlic is fragrant. Add broth or water, bring to a boil, simmer until potatoes are cooked through. Remove from heat.
In small skillet, heat remaining 1 tbsp coconut oil until hot, but not smoking. Add cumin, turmeric and salt. Cook and stir constantly for 1-2 minutes. Add to soup.
Transfer to blender, in batches if necessary, or blend with immersion blender until desired consistancy. Return to pan and reheat.
To serve, ladle into bowls, top with a squeeeze of lemon juice and a spoonful of fresh cilantro.