Peel potatoes, cut into chunks and microwave until softened. Mash roughly and flavour with a spoon of curry bomb, chaat masala and salt.
Airfry aubergine with a light coating of oil from curry bomb.
Make the sandwich: Layer potato, aubergine, spinach and cheese in bread. Spread the outside with butter. Toast in a panini press or frying pan until deeply golden on both sides and the cheese is melted.
Make chutney: Blend mint, coriander, chili, garlic, cumin with 1 teaspoon water, slowly adding more as needed to blend smooth. Season with lemon and salt.
Drizzle toastie with more curry bomb!
Serve with green chutney to dip into.