Tomato paste is a richly flavored tomato concentrate made from ripened tomatoes that have been cooked for several hours, strained, and reduced. The result is a thick red paste that's perfect for adding hearty flavor to sauces. Spoon tablespoonfuls of leftover paste onto a baking sheet, and freeze. Store the frozen paste in a heavy-duty plastic freezer bag. It'll be measured and ready for your next recipe.
Try this Kitchen Shortcut with Chipotle Sloppy Joes.