This cocktail is a delicious and beautiful drink to get the party started. The flavours of summer – strawberry and elderflower – add sweetness and colour to fizzy, dry Prosecco and the slight bitterness of Campari. Serve this cocktail in chilled champagne flutes, with fresh strawberries to decorate, and a bowl of fresh olives and oven warm bread: it’s the perfect way to greet guests.