Scatter the red pepper and chorizo over 2 tortillas, then sprinkle over the cheeses. Place the remaining 2 tortillas on top and gently press together.
Heat a dry nonstick frying pan until hot, add a tortilla and cook for 1–2 minutes until lightly browned, then carefully turn the tortilla over and cook for a further 2–3 minutes until the cheese has melted. Remove from the pan and keep warm. Repeat with the remaining tortilla.
Serve the tortillas cut into wedges with guacamole.