If adding any fresh vegetables to the patties, clean and dice all vegetables.
If adding any frozen vegetables, cook these to the package directions and set aside.
Preheat oil in a medium sized skillet on medium low heat.
In a medium sized mixing bowl, add the flour, spices, mustard, baking powder, vinegar, water, and almond milk. Stir until well combined.
Add the mushrooms, corn, spinach, and stir.
Pour about 1/4 to 1/3 cup of batter into the hot pan.
Let this cook for about 3 to 5 minutes, you will notice the sides of the patty starting to brown, flip the patty, continue cooking for about another 3 to 5 minutes.
Check the middle of the patty by pressing the edge of the spatula into the center of the patty to see if it is completely cooked.
If the batter is runny when you press in the center, it needs to continue cooking. Keep flipping the patty to cook evenly, and continue checking the center.
Once your patty is cooked, remove from the pan and continue with the next patties until the batter is used up.
Set the patties aside.