sourdough bread - 2 slices (use slices with holes for steam vents)
homemade mayonnaise - watch the video to see (spread on each side of the bread)
butter - watch the video to see (used for initial toasting and later with olive oil)
olive oil - watch the video to see (used with butter for final toasting)
Monterey Jack cheese - watch the video to see (layered inside the sandwich)
Swiss cheese - watch the video to see (layered inside the sandwich)
Kobe Jack cheese - watch the video to see (layered inside the sandwich)
cheddar cheese - watch the video to see (layered inside the sandwich)
fresh Reggiano cheese - watch the video to see (added to elevate flavor)
garlic powder - a pinch (sprinkled inside the sandwich)
nutmeg - a pinch (sprinkled inside the sandwich)
cracked black pepper - a pinch (sprinkled inside the sandwich)