In a pot, bring 4 cups of water to a boil.
Gradually whisk in the grits, reduce heat, and simmer for 20-25 minutes.
Meanwhile, cook the chopped bacon in a skillet until crispy.
Remove the bacon and set aside, leaving the drippings in the pan.
Add minced garlic to the skillet and sauté for 1 minute.
Add the shrimp to the skillet, seasoning with salt and pepper, and cook until pink.
Stir in heavy cream and cheese, mixing until melted and creamy.
Fold in the cooked grits and butter, blending well.
Serve the shrimp mixture over a bed of grits.
Garnish with crispy bacon and green onions.