Every seafaring country has its favorite version of the fish cake, and I confess I love them all. This perfect marriage of convenience — yesterday's leftover cooked or smoked fish mixed with yesterday's leftover mashed or baked potatoes — is far more than the sum of its parts.
After spending years of summers on Madeline Island, I've experimented with endless versions of the humble fish cake and definitely favor using smoked whitefish from Lake Superior. Of course, smoked trout, salmon or herring work nicely, too. While cooked fresh fish is always an option, smoked fish is a convenient choice, already cooked, with a kiss of smoke and salt.
For a fluffy, light fish cake, you need a light, fluffy mash. The russet or baking potatoes that have high starch and low moisture are the best choice, though Yukon Gold potatoes (medium starch) will work in a pinch. Waxy new potatoes and red boiling potatoes are much too dense and moist.
Too many recipes call for the addition of eggs, cream, mayonnaise, flour or breadcrumbs, which results in a confusion of flavors and a heavy, dense texture. Keep things simple by using a ratio of about three parts fish to one part potato.
One of the beauties of fish cakes is how easy they are to experiment with. The very blandness of the potato and mild fish nicely offset bolder flavors. Feel free to add the following to the basic recipe: a few tablespoons of capers, fresh dill and lemon zest; or chopped chives, thyme and shredded carrots for color. Serve these with horseradish-spiked mayonnaise, tartar sauce or ranch dressing.
Take a completely different tack and substitute the same amount of mashed sweet potatoes for the russet potatoes and add a few sweet, tart, spicy flavors. Season those cakes with chili oil, lime zest and lime juice; or grated fresh ginger, curry powder and lemon juice; or chopped chiles and cumin. Then garnish these with chopped cilantro and serve with a side of whole-milk Greek yogurt.
When our kids were young, these fish cakes became a weeknight staple, far better than frozen fish sticks and just as easy to dip into any sauce. They're also terrific for breakfast or brunch topped with a fried egg; at lunch, try them on a soft bun slathered with tartar sauce and a slide of coleslaw. Paired with a crisp green salad and a thick wedge of crusty bread, they make a fine, light easy meal.
Smoked Whitefish Cakes
Serves 4 (easily doubled).