Preheat your oven to 400°F and line a baking sheet with a piece of parchment paper.
In a medium mixing bowl, whisk together the almond flour, egg, garlic powder, dried oregano, and sea salt until a smooth, thick batter forms.
Transfer the batter to the prepared baking sheet and use a spatula to spread it into a thin 6-inch circle.
Bake the crust for 8 to 10 minutes, or until the edges are golden brown and the center feels firm to the touch.
While the crust bakes, toss the shredded cooked chicken breast with the BBQ sauce in a small bowl until evenly coated.
Remove the crust from the oven and spread the BBQ chicken mixture evenly over the surface, leaving a small border for the crust.
Top the chicken with the thinly sliced red onion and the shredded mozzarella cheese.
Return the pizza to the oven and bake for an additional 5 to 7 minutes until the cheese is melted and bubbly.
Remove from the oven and let it cool for 2 minutes before garnishing with fresh chopped cilantro.
Slice into wedges and serve immediately for the ultimate clean-eating comfort meal.