Originally from Russia, blinis are bite-size buckwheat pancakes that are traditionally topped with caviar and sour cream. They freeze well and make great last-minute nibbles. You’ll usually find them in packs of 16, from most large supermarkets.
Blitz the avocados with the lime juice and Tabasco sauce. Transfer to a bowl and stir through the sliced spring onions, chopped tomato and finely chopped coriander leaves. Season well and mix to combine. Spoon onto blinis, then top each with a large, shelled cooked prawn. Add extra coriander leaves to serve.