-You can use regular yellow mustard or dijon mustard if you like that flavor best.
-Lots of recipes call for a T. of poppy seeds, I feel 2 teaspoons is plenty but feel free to add more.
-I usually use onion flakes, but fresh onions work too, just dice really small and cook with the butter when you melt it.
-If you don't use the sweet hawaiian rolls you may want to add a T. of brown sugar to add the sweet factor to the rolls.
- For the cheese I take a regular sandwich slice and cut in fourths and use 2 small squares for each slider. Depending on the thickness and size of the ham, I usually add a whole pieces of thin ham folded to fit the roll. If using leftover ham, just cut to fit the roll.