This recipe is a great way to use in-season tomatoes! Salsa is a very versatile recipe. You can increase or decrease any of the ingredients to make it fit your personal taste.
Tomatoes: I prefer fresh tomatoes (especially when they are from my garden), but canned tomatoes are perfectly fine to use.
Onion: yellow or white onions are commonly used in salsa, but red onion may be used instead.
Jalapeño: I enjoy adding fresh peppers for the crunch, but canned works as well.
Cilantro: fresh cilantro is a delicious addition to salsa, but there are some people who dislike the flavor. Feel free to use any herb instead of cilantro, such as basil, parsley, or dill.
Lime: is an acid that adds a burst of citrusy flavor to the recipe. If you need to replace the lime opt for equal parts lemon juice instead, or use vinegar to keep the acidity.
Salt: salt is not required for the recipe, so for those trying to reduce their salt intake feel free to leave it out.
Other suggestions:
Bell peppers make a good jalapeño replacement for a less spicy option.
Other hot peppers could be used in the salsa such as cayenne or habanero to add more spice, but make sure to wear gloves or throughly wash hands after handling them. Take care not to touch your face or eyes.
Some other spices that are great in salsa are black pepper or ground cumin.