Sweet plantains for those of you that aren't familiar with them are the very ripe plantains. They have a partially black or all black peel and will be soft to the touch. The darker the peel the sweeter (and mushier) the plantain is.
I used 2 plantains. I sliced them into about 2 inch rounds (leave the peel on) and place them into a pot and covered them with water. Boil until tender. About 20 minutes.
When the plantains are tender, carefully remove them from the pot. You can easily remove the peel now. I use a fork and knife to remove the peels to avoid burning my hands. Mash up the plantains with a fork. This mash is called "Fufu de Platano".