Mushy Peas Are the Quintessential British Side Dish

Melt 4 tablespoons unsalted butter in a large saucepan over medium-high heat. Add the scallions and cook, stirring occasionally, until softened, about 5 minutes. Add 2 (10-ounce) packages frozen green peas. Cook, stirring occasionally, until the peas are thawed, 3 to 5 minutes.