I do a no sparge, no boil, no hops to make my Egyptian historical brew. Just mashing baked grain breads with dates and chamomile. I sulfite it to kill the bugs, then pitch my starter. Over time it turns beautifully clear, and is a light bodied summer brew with notes of the chamomile and dates. Oh, and it keeps winning golds in 23AFascinating - can you post a recipe?
So yes, it can definitely be done.