Slice green onions crossways as thin as you can up to the green tops. Chop the cilatro leaves as fine as you can. Do the same with the serranos. Combine all ingredients in a bowl. All amounts can be varied to taste. You can add chopped fresh tomatoes and substitute your favorite peppers too.
Can be used immediately, but it gets better with time. Great as a dip with tortilla chips or use it to spice up other dishes.