Preheat your oven to 425°F (220°C).
Spread taco sauce evenly over the pizza crust.
Layer the shredded chicken or beef on top of the sauce.
Sprinkle the shredded cheese generously over the meat.
Add diced tomatoes, black beans, olives, and onions evenly across the pizza.
Bake in the oven for 15-20 minutes, or until the cheese is melted and bubbly.
Remove the pizza from the oven and let it cool for a few minutes.
Top with fresh cilantro and diced avocado.
Drizzle sour cream over the pizza for added richness.
Slice and serve hot!