Wash cucumbers thoroughly under cold running water, slice them in half lengthwise, scoop out the seeds, and chop into bite-sized pieces.

Dice tomatoes and finely chop red onion, then add them to the mixing bowl with cucumbers.

Add fresh cilantro to the bowl and mix gently.

Finely dice jalapeño, adjust for spice preference, and add to the mixture.

Squeeze lime juice over the mixture and add salt; stir until well combined.

For optional enhancements, add diced avocado, minced garlic, and drizzle olive oil as desired.

Cover the bowl and chill in the refrigerator for at least 30 minutes before serving.