I'm using Little Bean's Multi-function food processor (B606) to make sweet potato puree for my baby.
Put a handful of cubed sweet potatoes into the plastic steamer. Before that, remember to pour 75-80ml of water into the compartment that holds the plastic steamer.
Put on the steamer cover/lid and press the steamer's button until you see the green light is turned on beside the orange light. The green light will turn off on its own to indicate that steaming is done. It takes about 10 minutes. Then, wait for another 3-5 minutes before opening the lid.
Next, transfer the steamed sweet potatoes to the blender and add water (boiled) to get the puree consistency you want, i.e. less water for thicker consistency. Press down the blender container and button (not shown) simultaneously for about 30 seconds.
Sweet potato puree is ready to be served to baby or freezed for next feeding.
To serve, I scoop about 3-4 teaspoons of puree into a clean small container and add in some freshly squeezed breastmilk. I've also tried adding half a teaspoon of virgin coconut oil (VCO) into 2-3 teaspoons of puree.
I have bought some plastic cube containers (can keep up to max 40ml puree in each cube) to keep frozen purees.