Thinly slice top rind off cheese, leaving sides and bottom intact.
To heat in oven, place on a foil-lined baking sheet for easy handling. Or place round on a microwave-safe plate. Stir all remaining ingredients together and spoon over cheese.
Topped cheese can be covered and refrigerated for up to half a day. When ready to serve, preheat oven to 350F (180C). Bake cheese, uncovered, in centre of oven until warm, from 8 to 10 minutes. Or microwave, loosely covered, on medium power just until warm, from 1-1/2 to 2 minutes. Serve right away with crackers such as water biscuits.