Chicken-and-Strawberry Salad

1/2 cup poppy seed dressing
1/4 cup mayonnaise
1 1/2 pounds chopped cooked chicken (about 3 1/2 cups)
2 celery ribs, sliced
1 pint fresh strawberries, halved
1 avocado, cut into 1-inch cubes
1/2 small red onion, thinly sliced
1/2 cup slivered almonds, toasted
1 (10-ounce) package mixed salad greens
Garnishes: avocado slices, whole strawberries

Whisk together dressing and mayonnaise in a large bowl; cover and chill 30 minutes. Add chopped chicken and next 5 ingredients to dressing mixture, gently tossing to coat. Serve over mixed salad greens. Garnish, if desired. Serves 6.

(from Southern Living)