How do I prepare this herbal tea and how strong should I make it?

Place one filter bag (1.5 g) in a cup or teapot and pour 200–250 ml of water that has just come off a full boil. Cover the vessel — a saucer on a cup or a lid on a pot — and let it steep for 10 to 15 minutes. Covering prevents the more volatile aromatic compounds from peppermint and valerian from escaping with the steam. After steeping, gently squeeze the bag against the side of the cup to release the remaining infusion, then remove the bag. The resulting tea will have a light amber colour and a minty, slightly earthy aroma. If you prefer a milder taste, shorten the steep to 7–8 minutes; for a stronger extraction of the hawthorn and motherwort constituents, go the full 15 minutes. Do not microwave the tea bag or re-boil the infusion, as prolonged high heat can degrade the more delicate polyphenols in hawthorn and the essential oils in peppermint and valerian.