Prepare Sweet Potato Puree: Steam the cubed sweet potato until tender, about 15-20 minutes. Mash until smooth. Measure out 1 cup of puree for the recipe.
Activate Yeast: Combine the lukewarm plant-based milk and maple syrup in a small bowl. Sprinkle the yeast on top, stir to combine and let it sit for about 10 minutes until it becomes frothy.
Make the Dough: In a large bowl, whisk together the white whole wheat flour, baking powder, and salt. Add the sweet potato puree, yeast mixture to the flour mixture, and applesauce. Stir until a dough forms. The dough should be slightly sticky but manageable.
Knead the Dough: On a lightly floured surface, knead the dough for about 5 minutes, adding more flour as needed to prevent sticking.
First Rise: Place the dough in a bowl, cover it with a clean damp towel, and let it rise in a warm place for about 1 hour or until it doubles in size.
Shape the Buns: Punch down the dough and divide it into 12 equal pieces***. Shape each piece into a ball and place them on a 13x9 baking dish lined with parchment paper.
Second Rise: Cover the buns with a damp towel and let them rise again for about 30 minutes.
Preheat Oven and Bake: Preheat your oven to 375°F (190°C). Once the buns have risen, mix 1 tbsp of plant-based milk and 1 tsp of maple syrup, and gently brush the tops with that mix (This step will help give them a nice golden color as they bake). Bake them for 20-25 minutes or until they are golden brown on top.
Cool and Serve: Remove the buns from the oven and let them cool on a wire rack. You can enjoy them as dinner rolls or slider buns.