Start by making the dressing. Put all the ingredients in a blender and blitz until smooth, green and only little flecks of herbs remain. Season to taste. If you have time for marinating, pour 100ml of the dressing into a container and add the Morrisons chicken breast fillets. Toss well to combine and set aside in the fridge. Will keep chilled for up to three days.

Heat a BBQ until the flames have subsided but the coals are white hot, or set a griddle pan over high heat. Brush a bit of oil over the grates of the BBQ or griddle pan and add the chicken. Cook for 4-5 mins each side or until cooked through, then transfer to a chopping board and set aside to rest for 5 mins before slicing.

Mix half of the dressing into the cooked quinoa along with the lettuce, celery and cucumber. Toss well and arrange on a platter, dotting the avocado slices, chicken and remaining dressing over the top. Scatter over the snipped cress to serve.