Cut across all the rolls lengthwise.

Just make one long even cut.

Then flip the rolls inside out. (The outsides of the rolls are now going to be your insides!)

Start placing the ham down on top of the rolls.

Just layering it as even as you can.

Now top with the sliced cheese.

Sprinkle the seasoned salt and minced onion on top of the cheese layer.

Gently place the other half of the rolls on top.

Spread the outside of this bread layer with an even but generous layer of mayonnaise.

Start heating up your large pan or griddle on medium-high heat.

Once your skillet has heated up, place entire sandwich (very carefully) mayonnaise-side down onto the skillet.

Then spread mayonnaise on the side that is now on top.

Put the lid on and let the one side get golden. (This will also help the ham and cheese warm up.)

Once the rolls have started to turn golden brown, flip the whole thing over.

I use two spatulas (one on each end) to help me flip it over easily.

Put the lid back on (keeping heat on medium) and allow the opposite side to brown and to allow the cheese to finish melting.

Place the entire sandwich onto a serving platter or a large plate and slice!