In a bowl/measuring cup, combine soy milk and 4 tsp lemon juice, and combine then let sit to curdle and thicken to make a vegan buttermilk.
In a large mixing bowl, whisk together lemon zest, flour, sugar, baking powder, baking soda, salt, and poppy seeds to get rid of any lumps.
Pour the soy milk (vegan buttermilk) mixture and oil into the flour mixture and whisk until lumpy but most flour is integrated. DO NOT OVERMIX. Let the batter sit for a few minutes (5 should be fine) to let the leavening agents work their magic.
Preheat a griddle to 350F (or a pan to medium heat) and brush an even light coating of the vegan margarine. Add 1/4-1/3 cup blobs of the pancake batter to the griddle. Gently flatten with a back of a spoon/ladle to get the desired shape and even out the batter. Cook for about 2-3 minutes until the edges are slightly cooked and bottom is golden. Flip and cook for another minute or two until that side is golden as well.