I thought this recipe was for a potato salad! I ended up making it thinking you added mayo and all of that stuff. But i realized this was just a mashed potatoe recipe after i made it. I did not add the dijon mustard to the recipe because it was awesome without it.! I will try to add the mustard and let you know how it goes. But i used a small food chopper and finely cut the onion and the garlic in my chopper. I was thinking mostly all of the onion floated out when idrained it, maybe it was minced a little too small. But it still had an excellent flavor. Definetly a keeper and easy..i will keep you posted on the dijon mustard addition.