Macaroni And Cheese Casserole
["6 Tbsp. butter", "1/2 c. chopped green pepper", "4 c. cooked elbow macaroni", "3 Tbsp. all-purpose flour", "1/2 tsp. dry mustard", "3 c. grated Swiss cheese", "1/2 c. chopped onion", "1/2 c. sliced celery", "1/2 c. chopped pimento stuffed olives", "1/2 tsp. salt", "dash of pepper"]
["In a large saucepan melt 3 tablespoons butter.", "Add onion, green pepper and celery; saute over medium heat.", "Cook until celery is almost tender (about 5 minutes).", "Remove vegetables. Mix in macaroni and chopped olives.", "Set aside."]
["butter", "green pepper", "macaroni", "flour", "dry mustard", "Swiss cheese", "onion", "celery", "pimento stuffed olives", "salt", "pepper"]