Chicken souvlaki

Name: Chicken souvlaki
Ingredients: 4 skinless chicken breasts, cut into 4cm/1½in pieces; 3 tbsp olive oil; ½ tbsp dried oregano; ½ tsp sweet paprika; 2 garlic cloves, grated; 1 lemon, grated zest and juice only; sea salt and freshly ground black pepper; 125g/4½oz Greek-style yoghurt; 3 tbsp mayonnaise; 1 tbsp honey; 2 tbsp English mustard; 4 pitta breads or flatbreads; 1 onion, finely sliced; ½ bunch flatleaf parsley, finely chopped; sliced tomatoes, shredded white or red cabbage (optional)