Kimchi double-cheese toasties

Combine the cheddar with the emmental or mozzarella and the spring onions in a small bowl.

Spread the mayonaise over one side of each slice of sourdough. Pile the cheese mixture over the plain sides of the bread, then spoon over the kimchi. Sandwich the slices together so the mayo-coated sides are on the outside, then sprinkle with sesame seeds, if using. Heat a large frying pan or skillet over a medium heat. Arrange the toasties in the hot pan and weigh them down with another heavy pan. Cook for 4-6 mins, then turn over and cook for 5 mins more. Cut in half to serve.