Make the Biscuit Dough: (See my note on using store-bought biscuits). In a food processor combine the flour, baking powder, baking soda, and salt. Pulse for a second or two to combine.
Next, add the sliced vegan butter and soy buttermilk. Pulse again for several seconds to allow the mixture to combine. If it's too crumbly, add a tablespoon or two more of plant-based milk.
Add Biscuit Dough to the Pan: Press the biscuit mixture into the bottom of the pan. You don't have to worry if there are bits of flour here and there. Just make sure it's evenly distributed across the bottom.
Tofu Scramble: Prepare the Easy Scrambled Tofu according to the recipe linked above. When done, spread the finished Scrambled Tofu evenly over the top of the sausage crumbles.
Add Veggie Sausage: While you're waiting for the Scrambled Tofu to cook, spread the veggie sausage crumbles evenly over the top of the biscuit layer.
Add Veggies: Optional: Add a layer of hashbrowns
Add Cheese: Top with shredded vegan cheese.
Place your dish in the oven and bake for 30 minutes, until the biscuit layer appears done and the cheese is melted. Tip: Sometimes vegan cheese may take a little bit more heat to melt. If so, turn the oven up to 425°F for the last 5 minutes to coax that vegan cheese to melt.
Remove from the oven to cool. Serve warm.