1.In A Medium Saucepan, Melt Butter Over Medium Heat. Saute Green Pepper And Mushrooms Until Pepper Are Crisp-Tender. 2.Meanwhile, Mix Together Flour And Seasonings; Stir Into Vegetables. Cook And Stir Until Flour Is Moistened. Stir In Broth And Milk. Cook, Stirring Constantly, Until Thickened. Add Turkey And Peas; Heat Through. Gently Stir In Pimientos. Spoon Into Shells And Serve Immediately.