Preheat your oven to 475°F (245°C).
Roll out the pizza crust on a floured surface until desired thickness.
Transfer the crust to a pizza stone or baking sheet.
Spread marinara sauce evenly over the crust.
Sprinkle dairy-free mozzarella cheese on top of the sauce.
Arrange sliced mushrooms and bell peppers over the cheese.
Add fresh spinach evenly across the pizza.
Season with dried oregano and garlic powder.
Drizzle a little olive oil over the toppings.
Bake in the preheated oven for 15-20 minutes until golden and bubbly.