1 (14 1/2 oz.) pkg. Kraft macaroni & cheese dinner
1 c. chopped onion
1/2 c. chopped bell pepper
2 tbsp. butter
2 cans condensed cream of celery soup
2 (6 1/2 oz.) cans tuna, drained, flaked
1/2 c. chopped pimiento
2 (3 oz.) cans mushrooms, drained

Prepare dinner as directed, except using 1 1/2 cups milk. Saute onion and bell pepper in butter until tender. Add to prepared dinner with remaining ingredients; mix well. Pour into 3 quart casserole. Bake at 350 degrees for 35 to 40 minutes. Makes 8 to 10 servings.