Of course you can use preferences, such as corned beef (yumm, my favorite but my son brought me some deli pastrami), Russian dressing or Thousand Island dressing (or we like to butter one side and mustard on the other; what I grew up with)…
Oven on high (425º)
parchment paper (or foil) on baking sheet will help you with clean up…big time.
lay muffins out on baking sheet, put dressing on muffins, on bottom side of each muffin layer a few folded slices of pastrami/corned beef, then swiss cheese.
I heat sauerkraut on stove in small sauce pan separately and put it on sandwich when its done. I don’t have an answer for that except it’s what I grew up with…never changed it.
yeah…here come photos as usual
from foil lined pan ⤵
I love to eat outdoors 😀
I was trying to see differences from sunlight, shade, etc.. I think they basically all look alike.