Bring Chicken Broth and 3 cups Water to a boil in a medium saucepan over high.
Whisk in grits, reduce heat to medium.
Cover and cook, stirring occasionally until tender, 20-23 minutes.
Meanwhile, heat oil in a large nonstick skillet over medium-high.
Add Onion and Poblano, cook, stirring often, until Onion is softened. 8-9 minutes.
Add Garlic cook 1 minute.
Stir in Diced Tomatoes, Colonel Pabst Worcester Sauce, Black Pepper, and 1/4 tsp Salt. Simmer 5 minutes.
Add 1 Tbsp Butter, cook, stirring often, until Butter is melted.
Add Shrimp, and cook until just pink, 3-4 minutes.
Add 6 Tbsp Parmesan, Half and Half, remaining 3 Tbsp Butter and remaining 3/4 tsp Salt to Grits, stir to combine.
Divide Grits among 6 bowls.
Top with Shrimp mixture.
Sprinkle wth Scallions and remaining 2 Tbsp Parmesan.
Drizzle evenly with Hot Sauce.