Preheat oven to 450° F. Spray a 16-inch pizza pan or baking sheet with non-stick spray. Add pizza dough and press into the pan.
Spread the ranch dressing evenly over the pizza dough, then top with 1 cup of the shredded cheese. Top the cheese evenly with the chicken, black beans and salsa. Sprinkle the top with remaining cheese and then the tortilla strips.
Bake pizza for 12 to 14 minutes, or until edges of pizza are golden-brown and cheese is melted. Remove from oven and let stand 5 minutes before slicing. Top with fresh cilantro, if desired.