In a medium sized skillet over medium high heat, cook the bacon until desired crispness. Remove with a slotted spoon and set aside on a plate.
Add the shrimp to the skillet and sprinkle with cajun seasoning. Add garlic and cook for 3-4 minutes until the shrimp is no longer pink.
To make the grits: Add the water, butter, milk and salt to a medium sized saucepan and bring to a boil. Reduce the heat and slowly add in the grits. Stir for about 5 minutes until the grits are thick and bubbly. Serve with the cajun garlic shrimp.