From Wikipedia:

"The Peanut Butter and banana sandwich, or peanut butter, banana and bacon sandwich, sometimes referred to as an Elvis sandwich or simply the Elvis, consists of toasted bread slices with peanut butter, sliced or mashed banana, and occasionally bacon. Honey is seen in some variations of the sandwich. The sandwich is frequently cooked in a pan or on a griddle."

It doesn't bode well for the initial post's suggestion "... why not make them healthier". It is reputed to have contributed to Elvis's demise.