You might think that ketchup and tomato sauce aren't the kind of ingredients you can substitute for each other. But with some creative thinking, there are ways to make some swaps in a pinch. If you ...

Use pureed tomatoes as a substitute for tomato paste in recipes that need a punch of tomato-y deliciousness. This includes sauces, marinades, and stews. If you’ve got some ketchup in the refrigerator ...