Preheat oven to 425°F.
Place the pre-made pizza crust on a pizza pan or baking sheet.
Spread tomato sauce evenly over the crust.
Sprinkle vegan ground beef substitute over the sauce.
Add diced onions, tomatoes, and sliced pickles to the pizza.
Sprinkle vegan cheddar cheese over the top of the pizza.
Bake in the oven for 10-12 minutes or until crust is golden brown and cheese is melted.
While the pizza is baking, mix vegan mayo, ketchup, and yellow mustard together in a small bowl.
Once the pizza is done, remove it from the oven and let it cool for a few minutes.
Drizzle the mayo-ketchup-mustard mixture over the top of the pizza.
Slice and serve!