Your family will be very pleased with this gooey baked mac and cheese (and peas!).
HEAT AND MIX: Adjust oven rack to middle position and heat oven to 400 degrees. In 8-inch square glass baking dish, toss together macaroni, cheddar, American cheese, cornstarch, mustard, and salt.
BAKE: Cover dish with aluminum foil. Bake until macaroni is tender, about 35 minutes. Use oven mitts to remove baking dish from oven and place on cooling rack.
Macaroni and cheese was born in Italy. Since Italy is the land of pasta, that’s not very surprising . . . But did you know that an American president was the first to bring mac and cheese here? Yup. In the 1800s Thomas Jefferson tried macaroni and cheese on a trip to Europe and brought a hand-written recipe back to the White House.