Avocado Citrus Salad

Ingredients:
- 3 tablespoons cider vinegar
- 2 tablespoons vegetable oil
- 1 tablespoon sugar
- 14 teaspoon salt
- 8 cups torn salad greens
- 2 oranges, peeled and sectioned
- 1 large grapefruit, peeled and sectioned
- 1 pear, peeled and thinly sliced
- 2 ripe avocados, peeled and sliced
- 1 cup green seedless grape
- 2 tablespoons chopped walnuts, toasted (optional)

Directions:
- Whisk together first 4 ingredients.
- Place greens in a large bowl.
- Add orange sectins and next 4 ingredients.
- Drizzle with dressing, tossing gently to coat.
- Sprinkle with walnuts, if desired.
- Serve immediately.