Can we have soya nuggets every night?

Yes, but not good...: Yes, one can eat soya nuggets (soy protein stuff) every day, because it is protein and there are no rules against eating it every day. However, "everything in moderation" is a good idea to live by. That means there may be some bad things about eating the same item every day, that we don't know about now but may discover in the future. Keep some variety in the diet, and in life in general.