Put water on stove to start brining it to a boil. Melt butter in a small skillet. Add garlic to the melted butter. Remove and set aside.
Just as the water is about to boil, turn down to medium and stir in the cream. Add the salt, and then slowly add in the grits, stirring constantly the entire time you are adding them in. When the grits begin to bubble, turn heat down to a medium low simmer, and continue cooking, stirring often, until mixture is thickened and creamy, about 5 minutes.
Add the garlic and butter and stir in the cheese. Cook the grits only long enough for the cheese to melt. Taste and adjust seasoning.