For most recipes, there are set ingredients that are required in order for you to make them
If you access your inventory (ALT-I or using the Inventory button in the lower right corner) you'll notice that you have a Quest items tab. If you look Last Chaos Gold in that section you'll see the kitchenware that Warrior Po (217,134) gave you.
Your next quest will be given by Soaring Du (110,159), and it is your introduction to Life Skills. Once you accept, open your skills menu (ALT-S or press the Skills button in the lower left of the screen) and select the "Life" tab to view your current Life Skills.
You should only have "Cooking" available, so click the "Make" button to view the list of food you are able to prepare. For most recipes, there are set ingredients that are required in order for you to make them.
In this case, the steamed bread necessary for the quest doesn't require any ingredients. Create the bread to complete the quest!
Your next quest is assigned by Soaring Du (110,159), and it's called "Medicine." He wants you to go talk to Pharmacist Sanchi Lu (103,132).
The pharmacist will give you a healing item when you talk to him. You can return to the pharmacist whenever you need to purchase healing aids.
Your next quest is assigned by Pharmacist Sanchi Lu (103,132), and it's called "1st Recommendation." He wants you to go back to Master Zhao (160,157) to receive your first recommendation notice.