This Italian-American classic can be assembled early in the day, refrigerated, and baked when needed. Use 3 cups of your favorite store-bought tomato sauce if time is short.

Have ready:

Prepare:

Position a rack in the center of the oven. Preheat the oven to 350°F. Lightly oil a 13 × 9-inch baking dish. Spoon 1 cup of the sauce into the baking dish. Arrange the chicken breasts over the sauce, slightly overlapping them. Sprinkle with:

Spoon over the remaining sauce. Top with:

Cover the dish with foil and bake until heated through, 20 to 30 minutes. To brown the top, remove the foil and place the dish briefly under a hot broiler. Serve hot, sprinkled with: