Just Make up a sandwich and place it in the Toast-a-Bag, there is no need to butter the outside of the bread, the PTFE coating makes Toast-a-Bags non-stick.
With the bag opening uppermost place filled Toast-a-Bag into the toaster and start cooking. When using a fixed width toaster you may need to use thinner bread.
When cooked simply serve the sandwich onto a plate.
Toast-a-Bags are reuseable, and can be washed in warm soapy water or placed over the plate prongs in a dishwasher.
Toast-a-Bags original can be used up to 300 times.