u003cbr/u003eA breakfast sandwich is typically made up of eggs, cheese, and meat served on bread or a bagel. u003cbr/u003eu003cbr/u003eHowever, there are endless possibilities when it comes to ingredients.u003cbr/u003eu003cbr/u003eu003cbr/u003eu003cstrongu003eu003cemu003eSome common breakfast sandwich combinations include:u003c/emu003eu003c/strongu003eu003cbr/u003eEgg and cheeseu003cbr/u003eBacon, egg, and cheeseu003cbr/u003eSausage, egg, and cheese (turkey sausage works too for a healthier breakfast sandwich)u003cbr/u003eHam, egg, and cheeseu003cbr/u003eVegetarian: Egg and avocadou003cbr/u003eEgg white and spinachu003cbr/u003eFried egg, tomato, and pestou003cbr/u003eSmoked salmon, cream cheese, and cucumberu003cbr/u003eu003cbr/u003eu003cbr/u003eBreakfast sandwiches can be served hot or cold. If you're in a hurry, you can even make them ahead of time and reheat them when you're ready to eat.