Preheat your oven to 425°F and line a baking sheet with parchment paper.
Grate or process the cauliflower into fine rice-like pieces. Transfer to a microwave-safe bowl and microwave for 4-5 minutes until slightly tender.
Allow the cauliflower to cool, then place it in a clean kitchen towel and squeeze out as much moisture as possible.
In a bowl, combine the drained cauliflower, egg, and almond flour until a cohesive dough forms. Season lightly with salt and pepper if desired.
Press the cauliflower mixture onto the parchment paper into a thin, even circle to form the crust.
Bake the crust in the preheated oven for 15-20 minutes until it starts to turn golden and firm up.
While the crust bakes, dice or shred the chicken breast and toss it with the buffalo sauce in a small bowl.
Remove the crust from the oven. Sprinkle the mozzarella cheese evenly over the base, then distribute the buffalo chicken over the cheese.
Return the pizza to the oven and bake for an additional 8-10 minutes until the cheese is melted and bubbly.
Allow the pizza to cool slightly before slicing and serving. Enjoy your flavorful, protein-packed pizza!