1) Peel and slice your peaches, slice the cheese, slice and lightly butter the bread.
2) Using a large skillet or non-stick pan, add a slice of bread, buttered side down for each sandwich. Put a layer of peaches and cheese on each slice. Top with arugula and the top piece of bread, buttered side up.
3) Cook over medium to medium-low heat, occasionally flipping until the bread is browned and the cheese is really melted. Gooey melted. Keep an eye on it to make sure the bread doesn’t burn. This will probably take 8-10 minutes.
4) Serve immediately.