My Mom used everything she had on hand in one way or another to put a delicious meal on the table every night. She used leftover mashed potatoes with a few added ingredients, formed them into patties and then fried them. She called them potato croquettes. Here is my recipe inspired by her potato croquettes. I do love potato knish and this recipe tastes so much like the deli treat with lots of mustard and green onion. Best to use cold mashed potatoes as they will stay together when you fry them. Even if you have added cheese, sour cream, butter or spices the leftover mashed potatoes will be fine in this recipe. Remember your mashed potatoes have been previously salted so easy on the salt. Serve with your choice of mustard...dijon, coarse grained, honey mustard, deli mustard. Make them a little smaller and serve them as appetizers. They are best served at room temperature so you can make them 2 hours ahead.

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