Wash and thoroughly dry the greens and all berries. Use a salad spinner for the greens and gently pat berries dry with paper towels.
Slice the strawberries into bite-size pieces, approximately 1/4-inch thick.
In a large bowl, place your dried mixed greens as the base layer.
Add the sliced strawberries, blueberries, and raspberries on top of the greens. If using optional ingredients like red onion or cheese, add them now.
Sprinkle the toasted sliced almonds evenly across the salad.
Drizzle the balsamic vinaigrette over the mixture, starting with less than you think you need.
Gently toss the salad until evenly coated, being careful not to crush the berries.
If using optional ingredients like mint or seeds, sprinkle them on top after tossing.
For extra sweetness, drizzle a small amount of honey or maple syrup over the finished salad.
Serve immediately on chilled plates for the best flavor and texture.