In a medium-size nonstick skillet, cook bacon over medium-high heat until crisp, about 5 to 6 minutes. Remove from pan to a paper-towel-lined plate to cool. Discard pan drippings.
In a large salad bowl, combine greens, apple slices, raspberries and walnuts. Gently toss with dressing. Crumble bacon over salad and serve.