Heat the oil in a frying pan and add the chicken and mushrooms. Fry for 3-4 minutes until the mushrooms are golden and the chicken is cooked through. Set aside to cool.
Place the salad leaves onto a large serving plate. Sprinkle over the celery, onion and radishes. Add the avocado.
Mix together the dressing Ingredients together with 2-3 tbsp water, until you have a pouring consistency.
Add the mushrooms and chicken to the salad and finish with a sprinkle of almonds.