Instructions
Go to Crystalsong Forest. If you entered Crystalsong from Dalaran, head southeast and you will see a river. If you entered Crystalsong Forest from Dragonblight, run north to arrive at the river. If you entered from Icecrown or the Storm Peaks, go southwest.
Run along the river bank and right-click on yellow herbs to acquire Crystalsong carrots. Once you have obtained four carrots, you must acquire four pieces of chilled meat. Chilled meat drops from several animals, including rams in nearby Dragonblight and bears in the Storm Peaks.
Open your spellbook and click "Cooking." Click "Basic Campfire" to create a fire. Open your inventory and right-click the "Stew Cookpot," which you were given as a quest item. As long as you have four Crystalsong carrots and four pieces of chilled meat, you will create the vegetable stew.
Return to Dalaran. Run inside the inn near the Eventide. Go to the back of the inn and right-click Katherine Lee to turn in and complete the quest. As a reward, you will receive a Small Spice Bag and a Dalaran Cooking Award.