In a small saucepan, bring 0.75 cup of the chicken broth and sea salt to a boil.
Slowly whisk in the stone-ground grits, then reduce heat to low and cover the pot.
Simmer the grits for 15-20 minutes, stirring occasionally, until the liquid is absorbed and the texture is creamy.
While the grits cook, toss the shrimp in a bowl with Cajun seasoning and black pepper until evenly coated.
Heat olive oil in a large skillet over medium-high heat and add the diced bell pepper and yellow onion.
Sauté the vegetables for 4 minutes until they are tender and slightly charred around the edges.
Add the minced garlic and seasoned shrimp to the skillet, cooking for 2-3 minutes until the shrimp are pink and opaque.
Deglaze the skillet with the remaining 0.25 cup of chicken broth, scraping up any browned bits from the bottom.
Stir the nutritional yeast into the cooked grits to add a rich, savory depth of flavor.
Spoon the grits into a bowl, top with the Cajun shrimp and vegetable mixture, and garnish with fresh parsley.