Preheat the oven to 350 degrees.
Lay the flatbread on a cookie sheet. Top the bread with shredded cheddar cheese and sprinkle granulated garlic on top. Top with the ground beef and tomato.
Bake in a preheated oven until the cheese melts and the edges of the bread start to brown (about 8 to 10 minutes).
For the Sour Cream Salsa Sauce - Mix the salsa and sour cream together. Set aside until the pizza comes out of the oven.
Just after removing the pizza from the oven, drizzle the sour cream sauce on top of the pizza.
Top with chopped green onion, cilantro and avocado. Sprinkle pepper on top of the ingredients.
Cut into small triangles and serve while warm.