Preheat oven to 220°C fan forced. Place the avocado, lemon juice, salt and pepper in a medium bowl and crush with a fork until smooth.
Spread each flatbread with the avocado mixture and sprinkle with cheese.
Divide the bacon and the tomatoes between each pizza. Make a slight well in the centre of each flatbread and crack the egg into it. Season with salt and pepper and drizzle with a little oil.
Cook for 13–15 minutes, or until the egg is just set and the bacon is cooked.
Serve sprinkled with sprouts and with hot sauce.