In a small bowl, mix the almond flour, salt and baking soda. In another bowl, whisk egg and oil; stir into dry ingredients. Press onto a 12-in. pizza pan coated with cooking spray; build up edges slightly. Bake at 350°F for 8-10 minutes or until edges are lightly browned.
Meanwhile, in a large skillet, cook and stir sausage and onion over medium heat for 4-6 minutes or until sausage is no longer pink. Spread pizza sauce over crust; sprinkle with garlic. Top with the sausage mixture, red peppers, olives, cheese and pepperoni.
Bake 18-20 minutes longer or until cheese is melted.