In a large bowl, whisk together the lime juice and olive oil. Season with salt and pepper to taste.
Add the diced cucumbers, red onion, tomatoes, jalapeno pepper, and cilantro. Gently toss everything together until well combined and evenly coated. Taste and adjust the seasoning if needed.
Cover the bowl and refrigerate for at least 30 minutes to allow the flavors to meld together. Serve the cucumber salsa chilled as a refreshing side dish or dip.
Note: The sodium in this recipe will vary according to how much salt you add.
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