Finish off with some tomato ketchup. Serve with chips or a salad. Begin by making the burgers. Cut the nduja into small pieces. As it is a paste, they will stick together a bit as you cut them ...

Several testers noted that Market Pantry's Tomato Ketchup from Target had a very tomato-forward taste. One tester summed up ...

This spicy take on tomato ketchup is a good way to use up any extra tomatoes that are past their best. Ketchup will last longer when stored in the fridge, but its high sugar and vinegar content ...