First weigh the 3 slices of bread. If it is over 60g cut off some of the crust from 1 slice and weigh it again, until you get 60g.
Next, cook the bacon and fry the eggs in a few sprays of low calorie cooking spray. You'll want the eggs quite hard so they don't make a mess when you eat the BLT.
If you want, you can toast the bread at this point.
Lay out the bread with the slice you cut the crust off in the middle.
Spread half of the ketchup onto one of the bigger slices then place the egg on top. Spread the rest of the mayo on one side of the smaller slice and lay it on top of the egg, ketchup side down
Spread the top piece of bread with half the mayo, then add the bacon, sliced tomato and lettuce. Put the remaining mayo on the last piece of bread.
Place this slice on top of the lettuce and cut the sandwich in half diagonally. Enjoy!