In a bowl, combine 3 tablespoons olive oil, 1 tablespoon red wine vinegar, 3 tablespoons honey, 3 cloves garlic (finely chopped), 2 teaspoons oregano, and 2 teaspoons chilli flakes. Stir well and season with salt and pepper to taste.
Wash the 4 chicken breast fillets, pat them dry, and cut them into thin strips across the grain.
Place the chicken strips in the marinade, stir to coat, cover, and refrigerate for about 3 hours, stirring every 45 minutes.
Preheat your oven to 60°C (140°F).
Heat a grill pan (or regular frying pan) over medium heat. Remove the chicken from the marinade and cook for about 3 minutes on each side until cooked through. Transfer to the warm oven.
In the same pan, fry the 2 red peppers (halved and cut into strips) for about 2 minutes on each side over medium heat. Transfer to the oven and mix gently with the chicken.
Heat the 8 tortillas according to the packet instructions.
Wash and tear the 1 iceberg lettuce. Place lettuce on each tortilla, top with the chicken and pepper mixture, roll up, and serve immediately.