Each capital has a separate quest board for every crafting branch, where you can start a crafting quest:

• Cooking and Herbalism
• Tailoring and Leatherworking
• Engineering
• Armoursmithing
• Weapon Forging

How they work

• You're asked to craft and bring a low-tier item.
• Claim your reward from the nearest Master — who also sells the recipes for the items you're asked to make.
• You can complete several a day, but only 4 at a time: after four, wait out a 2-hour "Questboard cooldown."