Stir the vinegar into the nondairy milk. Separately, mix the flour, sugar, baking powder, salt, cinnamon, and nutmeg together in a bowl. Add the shortening and rub it in to the flour with your fingertips or a pastry blender. Slowly pour in the milk and stir until the dough comes together.
Knead the dough in the bowl for 4 minutes, until the dough is mixed well and