Canadians have known forever that ketchup chips are delicious, but Americans have been slow to get on board. But this summer, Trader Joe's is bringing them to the American market in two ways -- as part of its 4-flavors-in-one-bag Patio Potato Chips, and now in Trader Joe's Ketchup Flavored Spud Crunchies ($1.99 for a 4…
