Cut back to 1/4 inch above a leaf stem, where the branch meets the main stem. Be sure to leave enough foliage so you plant can continue to grow. Removing flower buds as they develop will preserve flavor.
True Neapolitan recipes, especially pesto.
Keeping It Fresh
Keep in a small vase of water and cover with a clear plastic bag with some holes in them. Keep in a bright spot out of direct sunlight.