You know all these cans of vegetable broth lined up on the supermarket shelves? -- a quick way to start a soup, or make a sauce, or juice up a simple casserole, sure enough. But while the convenience factor is tempting, I've never actually broken down and bought a can. Why? Because you can get the same thing cheaper and just as easily, right in your own kitchen. Bonus, no extra packaging waste to burden poor Mother Nature!