We've been eating Japanese curry for years now. Usually just the store bought rue like House or whatever. Some are better than others, but none of them are great. I realize there's probably nothing like making it all from scratch, but does anyone have any suggestions on how we can take our curry up a notch? Not looking to make it spicier. Just some techniques or ingredients that can give a deeper and richer taste. My wife picked up a tip of cooking it with some apple, which helps round out the taste.