In a small saucepan, bring the chicken broth to a boil over medium-high heat.
Whisk in the stone-ground grits and sea salt, then reduce heat to low, cover, and simmer for 15-20 minutes until tender and thickened.
While the grits cook, heat the extra virgin olive oil in a large skillet over medium-high heat.
Add the diced onion, bell pepper, and celery to the skillet, sautéing for 4-5 minutes until the vegetables have softened.
Stir in the minced garlic and Cajun seasoning, cooking for 1 minute until the spices are fragrant.
Add the shrimp to the skillet in a single layer and cook for 2-3 minutes per side until they are pink and opaque.
Stir in the lemon juice to deglaze the pan and remove the skillet from the heat.
Once the grits are fully cooked, stir in the grass-fed butter and plain Greek yogurt until the texture is creamy and smooth.
Divide the grits into serving bowls, top with the Cajun shrimp and vegetable mixture, and garnish with fresh parsley and black pepper.