Use white colored bread. 

(Potato, sourdough or straight white.)

Use Beefsteak tomatoes. 

(Ideally, chilled.)

Mix pesto into your mayo.

(Or siracha; use arugula.)

Bacon is crunchy, but not crumbly. 

(Three to four slices per sandwich.)

Layer matters:

Toasted white bread, 

MayoSpread on each slice, 

Lettuce (Boston red bibb,)

A SINGLE FAT SLICE OF TOMATO, 

Bacon chorus line.

Enjoy.