In a small saucepan, bring 1 cup of water and a pinch of salt to a boil.
Whisk in the stone-ground grits, reduce heat to low, cover, and simmer for 15-20 minutes until thickened and creamy.
While the grits are cooking, pat the shrimp dry and toss them in a bowl with Cajun seasoning, sea salt, and black pepper.
Heat the olive oil in a large skillet over medium-high heat.
Add the diced bell pepper and onion to the skillet, sautéing for 3-4 minutes until softened and aromatic.
Add the seasoned shrimp to the skillet and cook for 2 minutes per side until they are pink and opaque.
Stir the nutritional yeast into the cooked grits until well combined for a savory, dairy-free finish.
Spoon the grits into a shallow bowl, top with the shrimp and vegetable mixture, and garnish with fresh parsley and a squeeze of lemon juice.