Wash the salad greens thoroughly under cold water and pat dry.
Slice the fresh strawberries into thin pieces.
In a large bowl, combine the mixed salad greens and sliced strawberries.
Add the crumbled feta cheese on top.
Sprinkle chopped walnuts over the salad.
Drizzle balsamic vinaigrette evenly across the salad.
Season with salt and pepper to taste.
Toss gently to combine all ingredients.
Serve immediately for the best flavor and freshness.