Bring the water and sea salt to a boil in a small saucepan over medium-high heat.
Slowly whisk in the grits, then reduce heat to low and cover, simmering for 15-20 minutes until creamy and tender.
Stir the ghee into the finished grits, cover, and set aside to keep warm.
While the grits cook, heat the olive oil in a large skillet over medium-high heat.
Add the diced onion and red bell pepper to the skillet, sautéing for 3-4 minutes until they begin to soften.
Toss the shrimp with the Cajun seasoning and black pepper, then add them to the skillet.
Cook the shrimp for 2-3 minutes per side until they are pink, opaque, and slightly charred.
Remove the skillet from the heat and stir in the lemon juice and fresh parsley.
Spoon the warm grits into a bowl and top with the zesty shrimp and pepper mixture.