Peel, core, and grate the apple and onion.
Cook them for 5 minutes in hot butter without browning (let them cool before adding to the mixture)
Remove excess fat from the ham slices and cut them into strips.
Put them in a food processor with the port and pulse a little.
Add the cooked apple and onion and continue mixing for a few minutes to get a smooth mixture.
Add the mascarpone, season with salt and pepper.
Whip the 35% cream into whipped cream and add it to the mixture.
Put the mixture in a bowl or serving cup and refrigerate for 30 minutes.
Serve with crackers or toasted bread slices.