1Prepare Grits: Bring 7 cups water to a boil in a 4 quart saucepan over medium-high heat. Slowly whisk in grits; reduce heat to medium, and cook, whisking constantly, 5 minutes. Cover, reduce heat to low and cook, stirring occasionally, 1 hour or until tender. Fold in the cheese and 1/4 cup butter.
2Prepare the Shrimp Sauce: Peel and devein shrimp.
3Cook the bacon in a large skillet over medium-high heat, stirring often, 4 to 5 minutes or until crisp; remove the bacon, and drain on paper towels, reserving 2 tablespoons drippings in the skillet.
4Melt 6 tablespoons butter in hot drippings in the skillet. Reduce heat. Add onion, poblano pepper, and garlic; saute 2 minutes or until onion is translucent. Add the shrimp; cook, stirring often, 1 to 2 minutes. Add salt and next 2 ingredients; toss to coat.
5Sprinkle the flour over the shrimp mixture; toss. Add broth and the next 2 ingredients. Cook just until shrimp turn pink, stirring to loosen particles from the skillet. Stir in the bacon and parsley. Serve over grits with the green onions.