Preheat the oven to 425 degrees F. In a small bowl combine oregano, chili powder, 1 teaspoon of salt and a ½ teaspoon of ground black pepper.
Add the tomatoes and half of the spice mixture to a food processor.
Pulse onto coarsely chopped. Transfer to a bowl.
Slice the steak into thin strips. Season the steak slices with the remaining spice mixture.
Heat olive oil in a large skillet over medium-high heat. Add the steak and cook while stirring occasionally until it has reached your desired doneness. Set aside.
Roll and press the pizza crust onto a lightly greased baking sheet. Place into the oven and bake for 7-8 minutes.
Remove from the oven and spread the tomato sauce over the partially baked pizza crust and top with Mexican cheese blend, cooked steak slices, poblano pepper, and onion.
Return to the oven and bake for 10-15 minutes or until the crust is golden brown and the cheese has melted.