Preheat oven to 350 degrees.
Slice sweet potatoes and set aside. Make sure to slice thin (use a mandoline slicer if possible).
In a small mixing bowl, combine half and half with minced garlic and seasoning. Set aside.
Grease 9" x 9" or medium-large casserole pan with oil.
Layer the sweet potatoes in the pan. Spread them out as evenly as possible – there will probably be 3-4 layers.
Pour half and half mixture on top of the potatoes.
Bake for 30 minutes or until potatoes have softened. Remove and sprinkle shredded cheese in an even layer over the top.
Bake additional 10 minutes or until cheese has slightly browned.
Allow to cool for 5-10 minutes before slicing. Enjoy!