2 tablespoons unsalted butter
½ yellow onion, diced
1 1-pound bunch Swiss chard, preferably rainbow chard, stems and ribs diced and leaves cut into 1-inch strips, blanched, and squeezed dry
2 cloves garlic, minced
¾ cup heavy cream
Generous pinch freshly grated nutmeg
Freshly ground black pepper
1/3 cup shredded Parmigiano-Reggiano
Preheat the oven to 375ºF. Generously butter 4 individual baking dishes. Heat a medium, heavy sauté pan over medium-low heat. Add the remaining butter and the onion and sauté for 5 to 6 minutes, or until soft. Add the chard stems and ribs and sauté another 4 to 5 minutes. Add the garlic and sauté 1 to 2 minutes more, or until fragrant. Remove from the heat, stir in the chard leaves, cream, and nutmeg, and season to taste with salt and pepper. Divide among the baking dishes and sprinkle evenly with the Parmegiano. Bake for 20 to 25 minutes, or until golden brown and bubbling around the edges. Serve immediately.
Serves 4. It’s important to squeeze all of the liquid from the blanched chard leaves or the dish will be soupy. The recipe can be prepared up to a day in advance, covered, and refrigerated and baked right before serving.