Toast as you like it, turning just once. Transfer to a plate. Generously spoon a dollop of ricotta on the top side of the toast. Lightly season with salt and pepper. Drizzle with dark honey.
Divide the avocado mixture between the sourdough toast slices, spreading to cover. Top with halloumi and a drizzle of the hot honey from the pan. Sprinkle with chopped coriander and serve.