*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
**Nutrient information is not available for all ingredients. Amount is based on available nutrient data.
(-)Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.
Place bacon in a large skillet and cook over medium-high heat, turning occasionally, until evenly browned, about 10 minutes. Drain on paper towels; crumble into small pieces.
Preheat oven to 450 degrees F (230 degrees C).
Heat olive oil in a skillet over medium-high heat. Add onion; cook and stir until translucent and starting to brown, 7 to 8 minutes. Remove from heat; transfer to a bowl.
Roll out pizza dough into a 12-inch circle and press into the bottom and 1 inch up the sides of a well seasoned 10-inch cast iron skillet. Fold the edges of the dough under and crimp like a pie.
Mix ricotta cheese and garlic powder together in a bowl; spread over the bottom of the crust. Scatter bacon, onion, mozzarella cheese, and black pepper on top.
Place cast iron skillet over high heat until mozzarella cheese starts to melt, about 3 minutes.
Transfer skillet to the preheated oven; bake pizza until crust is lightly browned, about 18 minutes.
Heat a large skillet over medium-high heat and coat with cooking spray. Add spinach; cook, stirring frequently, until wilted, about 1 minute. Transfer to paper towels to drain excess moisture. Place spinach over pizza; slice into 8 wedges.