Combine the 1/2 tsp yeast and 2 Tbsp of warm water in a small bowl. Stir and allow to proof for about 5 to 10 minutes.
Sift 2 cups of all purpose flour into a medium or large bowl. Add the powdered sugar, bloomed yeast mixture, milk, and water. Mix until combined. The flour mixture will be loose and will not form a dough ball until the kneading process.
Add a Tablespoon of flour onto your kneading surface and dump the flour mixture onto the surface.
Begin kneading the dough by pushing down and away from you. Turn 90° and repeat. Pull in the loose flour each turn. If your dough is too dry, add 1 Tbsp of water. If it is too wet, add 1 Tbsp of flour. Dough should not be sticky.
Continue to knead for 5-10 minutes or until dough becomes smooth and more pliable. Form a disc when the dough is soft and pliable.
Drizzle about 1 Tbsp of olive oil into the inner pot of the NInja Foodi. Swirl the top of the dough in the olive oil and flip it over. Cover the dough in the inner pot of the Ninja Foodi with a damp towel. Set the dehydration mode to 105° F and let the dough proof for 30 minutes. If you don't have the dehydration setting see post on how to proof the dough using the bake/roast setting.
Once the dough has doubled in size and feels spongy and soft, split the dough into golf ball size balls. You can get about 12 buns out of this recipe.
Roll into a smooth ball and then flatten with the palm of your hand so they are oval and flat. Place each flat oval onto a small piece of parchment paper. Place a smaller piece of parchment and lay the edge to the middle of the oval. Lay a chopstick over the edge and fold the bun over, remove the chopstick. See video for details.
Place the buns in the steamer basket, cover and allow to rise for 20 minutes.
Place 3 cups of water into the inner pot. Put in the steamer basket, make sure water is not touching the buns. See post for more details. Cover and set the Ninja Food to steam for 12 minutes. Make sure the black valve is set to vent. *I recommend only steaming one layer of buns at a time.
Remove buns, fill them with your favorite filling. Serve & Enjoy!