Microwave sweet potatoes according to package. Let rest to cool 5 minutes, then slice lengthwise. Scoop out the insides of the sweet potatoes (discarding the skins) and place in a large bowl.
Place sliced ripe bananas in the bowl, add the brown sugar, and the orange juice. Using a fork, mash until desired consistency. Serve immediately.
If you cannot find or do not like to use microwavable sweet potato bags you can peel and dice 1.5lb of sweet potatoes. Boil in a pot of water with salt for 15 minutes until fork tender. *Like it spicy? Add 1-2 tablespoons of minced jalapeño to the sweet potato mash!