You’ll need:

2 slices of bread
2 slices of cheese
A toaster
A microwave

First toast the bread in the toaster. Take them out when done.
Then lay the toasts on a plate.
Take the cheese and lay each slice on top of the toasts.
Place the plate in the microwave and nuke on high for 15-20 seconds until the cheese is melted.
Put the two pieces together.
Eat.