Like Sam2, I also see no problem, & am planning on already having Matzo Ball Soup during Shulchon Oruch @the very 1st Seder, and throughout Pesach.
FYI:- Once Matzo is baked, it can never become Chometz.
However:- You ontheball have option of being Makneh:- Selling your Matzo Meal to me or Sam2, and then it is our Matzo that is being mixed with water during the 1st 7 days of Pesach, and we shall allow you to consume our cooked Matzo meal on Acharon Shel Pessach.