Preheat your oven to 425°F (218°C).
Place your pre-made pizza crust on a baking sheet or pizza stone.
Spread the tomato sauce evenly over the pizza crust.
Add the sliced black olives, sliced mushrooms, diced green bell pepper, and diced red onion to the pizza.
Sprinkle the vegan mozzarella cheese on top of the vegetables.
Drizzle olive oil over the top of the pizza, and sprinkle with dried basil, salt, and pepper.
Bake the pizza in the oven for 12-15 minutes, or until the crust is golden brown and the cheese is melted.
Remove the pizza from the oven and let it cool for a few minutes before slicing and serving.