This is an adaptation of a grainy honey mustard recipe I found at about.com ... I couldn't find a recipe for a simple maple mustard anywhere, so I tried my own. To be honest, it didn't taste that great right after I finished it -- and two days out, it still wasn't winning any awards. But now I'm four days out, and it tastes GREAT -- the maple flavor isn't pronounced, but it definitely has a different flavor than honey mustards. You can make it spicier by using brown mustard seeds, or sweeter by adding more maple syrup.