In a food processor, add flour, baking powder, salt, olive oil, and water, and then pulse.
Slowly add in plant-based milk, little by little, and use up to ½ cup.
Dump ¾ of the mixture into a pie dish and press with fingers to mold to the shape of the dish. Alternatively, you can use a rolling pin and roll the dough into a circle on a silicone baking mat, then drape over the pie dish. If choosing this method, use a butter knife to cut excess crust off of the edges.
Using a rolling pin, roll the remaining mixture on a silicone baking mat until ¼ inch thick to begin working on the lattice. Ensure that the length of this rolled out crust is at least as wide as your pie tin.
Using the dull side of a knife, slice into strips 1” wide and 10-12” inches long.