Combine the cucumber, jalapeño, white onions, and cilantro in a bowl.
Add the lime juice (to get the most juice out of a lime, roll on a hard surface before cutting in half) and season with the cumin, salt, and black pepper.
Refrigerate before serving!
Cucumber salsa adds a delicious freshness to Mexican food favorites! The crisp, cool cucumber paired with a spicy jalapeño is perfect with chips or even on top of tacos. Our favorite way to eat this at home is straight out of the bowl! ;)