Boil pasta as directed on the package. Drain well. In a pan on low, heat 2 Tablespoons Butter until melted. Add your flour and stir until thick. To this add your milk and whisk until it is combined and there are no lumps. Add your seasonings and whisk continually until the sauce thickens. Toss in thawed shrimp to heat. Pour this mixture over your pasta and serve hot. Great with bread sticks and a Caesars salad.