Set Instant Pot to saute setting and bring 2-3 tbsp of a mild oil to heat.
Add onions and saute until transluscent.
Add 1 tsp grated ginger and 2 tbsp red curry paste and cayenne pepper if desired.
Stir and allow the flavors to blend for 1-2 minutes before adding the chopped and peeled carrots
Saute carrots for 1-2 minutes until slightly softened and add rinsed red lentils, 1 can coconut milk and 2 cups of vegetable broth or water. Season with 1 ½ tsp salt.
Close the lid and set on manual for 6 minutes with a slow release of 10 minutes.
Carefully remove the lid and blend the soup using an immersion blender. Adjust salt to taste.
Squeeze in the juice of about half a lime (add a little at a time until you reach your desired tartness)
Serve, garnished with some fresh chopped cilantro