If I want to make my own...

Salsa recipes are as varied as those for tomato sauce, but the basics include two or three types of chili peppers—hot or mild—and tomatillos, tomato-like fruits with papery husks that come from Mexico. The tomatoes for your salsa can be almost any variety or a combination. Cherry tomatoes, plum tomatoes, or the larger beefsteak versions are all acceptable. Some recipes call for green tomatoes. You should also grow some garlic and onions.