Isotopes are atoms of the same element (that is, with the same number of protons in their atomic nucleus), but having different numbers of neutrons. Most (66 of 94) naturally occurring elements have more than one stable isotope. Thus, for example, there are three main isotopes of carbon.
According to Nestle, the parent company of Hot Pockets, a frozen Hot Pockets Cheeseburger sandwich should cook for 2 minutes in a 1100 watt microwave oven. A refrigerated sandwich cooks for 1 minute. In a 700 watt microwave oven, a frozen Hot Pockets Cheeseburger sandwich cooks for 2 minutes 15 seconds.
Bake until puffs rise and are golden brown, about 30 minutes. Let cool on sheets on wire racks. Puffs can be stored at room temperature for up to 1 day. Transfer pastry cream to a pastry bag fitted with a 1/8-inch plain round tip. Insert the tip into the opening of each pastry, and pipe to fill with pastry cream. Serve immediately.