Chicken & Peanut Curry

Name: Chicken & Peanut Curry
Cuisine: Asian, Thai
Ingredients: 1 tbsp vegetable oil or; 2 red onions, sliced; 2 tbsp Penang Gurry Paste; 400 ml/14 fl oz coconut milk; 150 ml//a pint chicken stock; 4 kaffir lime leaves, coarsely torn; 1 lemon grass stalk,; 6 skinned, boned chicken thighs; 1 tbsp fish sauce; 2 tbsp Thai soy sauce; light brown sugar 1 tsp; 50 g/1% oz unsalted peanuts,; 175 g/6 oz fresh pineapple,; 6-inch piece cucumber