To make the relish just add all ingredients together in a bowl and mix vigorously for 5 mins.
For the quick aioli, whisk all the ingredients onto the crushed garlic and season.
Toast the ciabatta roll and mark on a griddle.
Place the bottom of the ciabatta bread on the plate and top with 2 slices of the premium oven baked ham, lightly folded and rolled to sit along the bread.
Nestle tomato slices between the ham folds and then top with mixed salad leaves. Drizzle on the aioli mayo to your liking and then add the top slice of the ciabatta bread. Serve with a generous spoonful of the onion relish on the side.