Looks like a good recipe, but I have a few questions.
1) - Ceyon powder? Do you mean Ceylon? (Sri Lanka) Cinnamon.
2)- Just to make sure on my measurements; when you end an ingredient with the word ground, chopped minced etc, it generally means your measure the item in it's whole form; such as seeds, cloves etc; then grind, chop or mince them. For your recipe are you using the seeds as measurement for the celery, mustard, and black pepper then grinding; or are you using the ground form of these ingredients for measurement?
Thanks