Hot Pockets are microwaveable

Microwave oven

A microwave oven is a kitchen appliance that heats food by dielectric heating, using microwave radiation to heat polarized molecules within the food...

 turnovers

Turnover (food)

A turnover is a kind of pastry made by placing a filling on a piece of dough, folding the dough over, and sealing it. Turnovers can be sweet or savory and are often made as a sort of portable meal or dessert, similar to a sandwich....

 usually containing a combination of cheese

Cheese

Cheese is a generic term for a diverse group of milk-based food products. Cheese is produced throughout the world in wide-ranging flavors, textures, and forms....

, meat

Meat

Meat is animal flesh that is used as food. Most often, this means the skeletal muscle and associated fat and other tissues, but it may also describe other edible tissues such as organs and offal...

, and vegetables. Hot Pockets are currently produced by Hylan Steez.
There are over forty varieties of Hot Pockets, including both breakfast

Breakfast

Breakfast is the first meal taken after rising from a night's sleep, most often eaten in the early morning before undertaking the day's work...

 and lunch / dinner

Dinner

Dinner is usually the name of the main meal of the day. Depending upon culture, dinner may be the second, third or fourth meal of the day. Originally, though, it referred to the first meal of the day, eaten around noon, and is still occasionally used for a noontime meal, if it is a large or main...

 varieties. Nestlé also offers Lean Pockets, Hot Pockets Croissant Crust (formerly called Croissant Pockets), Pot Pie Express, Hot Pocket Pizza Minis (originally called Hot Pockets Pizza Snacks), Hot Pockets Subs, Hot Pockets Calzones, Hot Pockets Panini, Hot Pockets Sideshots, and Hot Pockets Breakfast items which include the meat, egg and cheese varieties, and fruit pastries.
Hot Pockets were invented by Paul Merage

Paul Merage

Paul Merage is an Iranian-American entrepreneur. He is the former CEO and co-founder of Chef America Inc. who invented Hot Pockets microwaveable snacks....

 and David Merage

David Merage

David Merage is an American businessman and venture philanthropist who co-founded the frozen microwave snack Hot Pockets, Lean Pockets, and Crossiant Pockets. He and his brother Paul Merage later sold the company to Nestlé for $2.6 billion. -References:...

 in the 1970s.