Preheat your oven to 425°F (220°C).
Roll out your whole wheat pizza crust on a floured surface and transfer it to a pizza stone or baking sheet.
Spread a thin layer of tomato sauce across the surface of the crust.
Sprinkle the shredded low-fat mozzarella cheese evenly over the sauce.
Arrange spinach leaves, bell peppers, mushrooms, and onions on top of the cheese.
Drizzle a little olive oil and sprinkle dried oregano and minced garlic (if using) on top for added flavor.
Bake in the oven for 15-20 minutes or until the crust is golden brown and the cheese has melted beautifully.
Let it cool for a few minutes, then slice and serve your delightful creation.