Bring water and sea salt to a boil in a small saucepan, then whisk in the stone-ground grits.
Reduce heat to low, cover, and simmer for 15-20 minutes until creamy, stirring occasionally to prevent sticking.
While grits cook, heat olive oil in a large skillet over medium-high heat.
Add diced onion and bell pepper, sautéing until they begin to soften and develop a light char.
Add the shrimp and Cajun seasoning to the skillet, cooking for 2-3 minutes per side until pink and opaque.
Stir in the minced garlic for the last 30 seconds of cooking to release its aroma.
Once grits are tender, remove from heat and stir in the grass-fed butter until melted and smooth.
Spoon the creamy grits into a bowl and top with the spicy shrimp and vegetable mixture.
Garnish with fresh parsley and a crack of black pepper before serving.