Recipe Autumn Fruit Salad

Ingredients
1 1/2 cups sugar
1/2 cup all-purpose flour
1 1/2 cups water
1 teaspoon butter or margarine
1 teaspoon vanilla extract
6 cups cubed unpeeled apples
2 cups halved seedless red grapes
1 cup diced celery
1 cup walnut halves

Directions
In a saucepan, combine sugar and flour. Stir in water; bring to a boil. Cook and boil until mixture thickens. Remove from the heat; stir in butter and vanilla. Cool to room temperature. In a large bowl, combine apples, grapes, celery and walnuts. Add the dressing and toss gently. Refrigerate until serving.