All ingredients are readily available at Tesco, Sainsbury’s, Waitrose, ASDA, and Morrisons. Eggplant (aubergine), zucchini (courgette), and potatoes can be found in the produce section, while crushed tomatoes, cinnamon, allspice, and Parmesan are in the pantry and dairy aisles. Ingredients for béchamel sauce (butter, flour, milk) are available in the dairy and baking sections.