Combine rice flour, oat flour, tapioca starch, salt, and coconut oil in a food processor. Pulse until you have small coconut oil grains. Pour mixture into a separate bowl and add cold water. Mix with your hands until you can form a ball. Wrap the dough ball in plastic wrap and flatten into a disc.
Preheat oven to 425 degrees F. Prep a baking sheet with parchment paper.
Roll out the dough into a rectangle between saran wrap. Spread a layer of the cashew ricotta across the dough. Leave about 1 inch around the edges, since the sides will be folded over.
Fold up the edges of the dough and brush with egg wash. Sprinkle everything bagel seasoning over the edge of the crust.
Sprinkle with microgreens before serving.