Green Chile Scalloped Potatoes

Russet Potatoes (, skinned and thinly sliced (I use a mandoline slicer to ensure uniform slices))

heavy Whipping Cream

roasted Green Chiles ((mild or hot), chopped)

grated Mild Cheddar Cheese

grated Monterey Jack Cheese

Red Onion (, diced)

unsalted Butter (, cut into small pieces)

Salt and Pepper