Start by preheating your oven to 475°F (245°C).
While waiting, season the chicken breast with salt, pepper, and a drizzle of olive oil.
On a skillet over medium heat, cook the chicken breast for about 6-7 minutes each side or until fully cooked. Once done, set aside and let it cool.
In the same skillet, add the minced garlic. Once fragrant, toss in the spinach. Stir occasionally until the spinach is wilted. Remove from heat.
Slice the cooked chicken into thin pieces.
Roll out the whole grain pizza dough on a floured surface to your desired thickness. Place it on a pizza stone or baking sheet.
Evenly spread the tomato sauce on the pizza dough. Sprinkle some chili flakes if you like it spicy.
Layer the cooked spinach and sliced chicken pieces.
Top everything off with the low-fat mozzarella cheese.
Bake in the preheated oven for about 12-15 minutes or until the crust is golden and the cheese is bubbly and slightly browned.
Remove from the oven and let it sit for a couple of minutes before slicing.