Rinse the jalapeño peppers and tomatoes under running water to ensure they are clean.

Peel and dice the onion, and chop the cilantro finely.

Deseed the jalapeños and roughly chop them.

Dice the tomatoes into bite-sized pieces.

Combine all the prepared ingredients in a mixing bowl.

Optionally, blend the ingredients in a blender until you achieve your preferred consistency.

Taste the salsa and season with salt, pepper, or garlic powder according to your preference.