In a large pot, bring water to a boil. Add salt and slowly whisk in the grits. Reduce heat to low and cook, stirring frequently, until thickened, about 5-7 minutes.
Stir in the milk and cook for another 2-3 minutes until creamy.
Remove from heat and stir in the butter, garlic, and 1 1/2 cups of the cheese until melted and well combined.
Fold in the cooked greens until evenly distributed.
Pour the mixture into a greased casserole dish. Top with the remaining cheese.
Bake in the preheated oven for 25-30 minutes, until the top is golden and bubbly.
Let cool slightly before serving. Enjoy!
Notes:
This casserole is perfect for a cozy dinner or a potluck. Feel free to experiment with different types of cheese or add some bacon for extra flavor.