Step 1

1 Spread the mayonnaise on one side of each slice of bread

Step 2

2 Place one slice, mayo-side down on a clean work surface and arrange the tomato slices on it

Step 3

3 Top with the cheese and bacon, if using, pressing down so that the cheese (if shredded) stays in place

Step 4

4 Lay the second slice of bread, mayo-side up, on top of the sandwich

Step 5

5 Heat a dry nonstick skillet over medium heat; place the sandwich in the center

Step 6

6 Cover and cook for 4 to 5 minutes, until golden brown on the bottom (this will depend on how hot your burner is and the type of skillet you use; start checking after 2 minutes)

Step 7

7 Turn over the sandwich and press lightly with a spatula

Step 8

8 Cover and cook for 3 to 4 minutes, until the bottom is golden brown and the cheese has melted

Step 9

9 Transfer to a plate and cut in half

Step 10

10 Serve hot