Chicken chunks and avocado salad

Difficulty:  Time: INGREDIENTS (x 4 persons): - 1 large head of Iceberg lettuce, in small chops - 2 fillets of organic chicken breasts - ½ red pepper, thinly sliced - 10 cherry tomatoes cut in halves - 1 handful of flat parsley - 2 tablespoons of sunflower seeds - 1/2 freshly-squeezed large lemon juice - 3-4 slices of Italian pancetta slices ...