Simmmer.

Step 1 of 4

Bacon and eggs

Step 1 of 4

Bacon into a cold pan

Lay the slices in a large heavy skillet with no fat and no heat, then turn the stovetop to medium. Let them come up to temperature slowly.

A hot pan makes the outside of the slice contract before the fat inside has melted, which is exactly why bacon curls up into a ribbon and stays soft in the thick part.