Herby barbecued chicken burger
Mix all the marinade ingredients in a bowl, add the chicken breasts and toss to coat, then cover with plastic wrap and leave to marinate for 15 minutes.
If using making the mayo, drain the sun-dried tomatoes, reserving the oil. Whizz in a food processor, then add the mayo and whizz again. Add a splash of the reserved oil and the paprika and mix until combined.
Place the marinated chicken breasts on the barbecue over a high heat and cook for around 10 -12 minutes in total, turning halfway with tongs, or until charred on both sides and cooked through. Transfer to a cutting board and slice thickly.
Halve and toast the buns on the grill pan, then layer up the chicken with slices of tomato and gherkin, spinach leaves and sliced onion (if using). Add a good dollop of mayo and serve.