In a medium-size bowl, mix together flour, salt, oregano, garlic powder and flaxseed. Next, slowly add water into the dry mixture, whisking constantly to prevent lumps from forming in the batter. Allow batter to sit at room temperature for 10 minutes.
Once the 10 minutes is up, heat a medium size skillet over medium-high heat and add coconut oil, coating the pan completely. Slowly pour the batter into the center of the skillet and, using the back of a spoon, spread it around the pan until the crust is about 1/2-inch thick. Cook for 2-3 minutes on the first side and then gently flip it over using a spatula.
While side two is cooking, add your toppings starting with the pesto and ending with the cheese. Lastly turn your broiler on high and cook the pizza either in your oven safe skillet or on a lined baking sheet for 5 minutes or until the cheese is melted. Serve immediately.