In a small saucepan, bring 1 cup of water to a boil. Slowly whisk in the grits and a pinch of sea salt.
Reduce heat to low, cover, and simmer for 15-20 minutes, stirring occasionally until the grits are tender and the water is absorbed.
Remove grits from heat and stir in the non-fat Greek yogurt until the texture is smooth and creamy. Set aside.
While the grits cook, heat the olive oil in a non-stick skillet over medium heat.
Add the diced onion and bell pepper to the skillet, sautéing for 3-4 minutes until the vegetables begin to soften.
Stir in the minced garlic and cook for another 30 seconds until fragrant.
Add the shrimp to the skillet and sprinkle with Cajun seasoning and black pepper.
Sauté the shrimp for 2-3 minutes per side until they are pink, opaque, and fully cooked through.
Remove the skillet from heat and squeeze the fresh lemon juice over the shrimp mixture, tossing to combine.
Divide the creamy grits into bowls and top with the zesty shrimp and vegetable mixture.
Garnish with fresh chopped parsley and serve immediately.