In a small saucepan, melt 6 tablespoons butter and 1/2 teaspoon salt over medium-low heat. Add 1 teaspoon chopped fresh sage and cook, stirring often, until the butter begins to brown, about 5 minutes. Stir in 2 tablespoons heavy cream and remove from the heat. Add 1/2 cup grated parmigiano-reggiano cheese when tossing with pasta.
