Apple and Tonka Bean Jelly

• 5 green apples, peeled
• 2 teaspoons lemon juice
• 1 tonka bean, finely grated using a

Line the base and sides of a 30 × 25 cm (12 × 10 inch) tray with freezer film. Quarter the apples and remove the cores. Place in a saucepan, cover with water, add the lemon juice and bring to the boil. Red