Preheat oven to 375 degrees F.

In the Instant Pot, put one cup of water inside and the sweet potatoes. Use the wire rack that comes with the Instant Pot to raise the sweet potatoes out of the water.

Choose high pressure for 15 minutes. Make sure your Instant Pot is sealed on the lid.

Once the sweet potatoes are done in the pressure cooker, take the skins off and discard. Put the potato in a bowl.

Add the coconut milk, butter, coconut sugar, and egg into the bowl with the sweet potato. Using a hand held mixer, mix everything well.

Pour sweet potato mixture in baking dish and bake for 15 minutes.

After 15 minutes, take it out of the oven and take a handful of pecans and marshmallows and top the casserole. (Use as much or as little as you want).

Put it back into the oven and cook for the remaining 10-15 minutes.

You may have to use a fork to spread the marshmallow around the top. Enjoy!