Wash your veggies and cilantro thoroughly.
Finely chop your tomatoes, discarding the top and bottom where the stem is.
Finely chop your bell peppers, discarding seeds and stem.
Peel and then finely chop your white onions, discarding the tops and bottoms.
Finely chop your cilantro.
Pour all chopped veggies into a bowl. Add your olive oil and apple cider vinegar, plus cilantro and salt to taste.
Give all ingredients a good stir with a wooden spoon. I like to put a lid on my bowl and shake vigorously.
Taste test and then add more cilantro, salt, oil, or vinegar if needed. Sometimes you need to adjust the measurements depending on the size of the vegetables you use!