[Why must the metzora bring cedar wood as part of a purification sacrifice?] Because the metzora became haughty like a cedar tree, the metzora was afflicted withtzara’at.... [And why hyssop?] Because among all the trees none is lowlier than the hyssop, and since the metzora has become lowly he or she will be cured by the use of the hyssop.
MIDRASH TANHUMA METZORA 3
Luckily, cedar and hyssop provide some culinary opportunities as well as discussion possibilities. I will get cedar chips and do some grilling for Shabbat. As for the hyssop, much of our menu will be seasoned with Za’atar, made of hyssop. We like Za’atar sprinkled on chummus, baked into foccacia (I may just do a “garlic bread” with za’atar—no baking as it is erev Pesach), and on our chicken. I will set the table with pictures of cedar and hyssop and ask the kids what the differences are between the two. Hoepfully, the visuals will help get us into a discussion that leads into the above-cited Midrash. We will also talk about lashon harah and brainstorm great discussion topics that steer away from gossip and negative speech.