A drizzle of your favorite dressing makes the meal when it comes to a good salad. If you have a favorite store-bought option, there's a chance you've seen ketchup on the ingredients list.

He's got mackerel fillets with sardine ketchup on toast, and whole mackerel with beetroot and apple salad. Mackerel with tomato and sardine ketchup on toast First make the ketchup, heat a large ...