2cupsred and green apples (1 of each apple) chopped
1cupred seedless grapes, sliced in half
In a small skillet over medium heat, heat walnuts until browned and fragrant, stirring occasionally, about 2 to 5 minutes. Remove from heat, let cool then chop to the desired size.
Place chopped apples into a large bowl and sprinkle with lemon juice and sugar. Add the sliced grapes, chopped celery, and walnuts.
In a small bowl, whisk together mayonnaise and sour cream. Pour the dressing over the salad ingredients and gently mix until combined. Cover bowl with lid or plastic wrap and place in the refrigerator to chill until ready to serve.