Prepare Rice According To Package Directions. Meanwhile, In A Large Skillet, Saute The Shrimp, Green Pepper, Onion And Mushrooms In Butter Until Shrimp Turn Pink. Add The Soup To The Rice; Stir Into The Shrimp Mixture. Transfer To A Greased 2-Qt. Baking Dish. Sprinkle With Croutons. Bake, Uncovered, At 350 Degrees F For 20-25 Minutes Or Until Heated Through.