Shredded roast chicken, mushroom and couscous salad with a garlic lemon butter dressing - Saints Foo

Ingredients

• 25g butter
• 25ml olive oil
• 400g button mushrooms
• salt and freshly ground black pepper
• 300g couscous
• 375ml boiling water or chicken stock
• 25g butter, cut into small cubes
• 2 cloves garlic
• 1 lemon
• 1 small red onion
• 1 punnet radish cress
• ½ free range roast chicken, meat shredded