Chiffonade doesn't directly reduce waste of herb stems; it's a cutting technique for leafy herbs. Herb stems can be used in stocks, sauces, or infused oils to reduce waste.
Chiffonade is a slicing technique used primarily for leafy green herbs like basil, mint, or spinach. The leaves are stacked, rolled tightly, and then sliced thinly to create delicate ribbons. This technique is used to enhance the visual appeal and flavor distribution of the herb in a dish. It doesn't involve the stems of the herbs. To reduce waste, herb stems, which are often discarded, can be used in various ways. They can be added to vegetable or chicken stock to impart flavor. They can also be simmered in sauces or infused into oils and vinegars. Tougher stems, like those from rosemary or thyme, are best suited for longer cooking methods where their flavor can be extracted slowly. So, while chiffonade is a great technique for using the leaves, it's separate from the issue of herb stem waste.
Don't throw away parsley stems! They are packed with flavor. Finely chop them and add them to your next batch of pesto or chimichurri for an extra burst of freshness.