To start, toast sesame seeds in a pan until fragrant and their color starts to change. Be careful not to burn them. Once toasted, remove the pan from heat and allow the sesame seeds to cool.
Meanwhile, measure out the other recipe ingredients (sumac, thyme, marjoram, oregano, and sea salt). Once the sesame seeds have cooled off, mix all the ingredients together.
Pour the spice mixture into a spice jar and store for up to three months. Using a funnel makes this task a little easier!
Notes
Making Zaatar in smaller quantities is better than making large batches. If you do make a larger batch, store the extra spice blend in ziplock bags in the freezer until needed.