Spread the ranch dressing evenly on the bread. Layer the avocado, tomato, turkey, and cheese on one slice of bread, then close it with the other piece of bread (it is. . .surprisingly hard to write directions about how to make a sandwich. I'm just going to assume you know how to make one).

Run a stick of butter around a frying pan over medium-low heat, then put your sandwiches in the pan (I like to put another heavy frying pan on top of the sandwiches because it helps them cook more evenly and presses everything together. (Like so)).

Cook for 3-5 minutes, until the bottom is golden brown, then flip and cook another 1-2 minutes on the other side (I press them down again with the heavy pan).

Cut in half and serve immediately.