Rinse fresh blueberries under cold running water and pat dry. Set aside in a large mixing bowl.

Slice ripe peaches into wedges and add to the bowl with the blueberries.

Crumble feta cheese over the fruit in the bowl.

Wash and dry mixed greens and add them to the bowl.

Finely chop red onion and sprinkle it over the salad.

Roughly chop walnuts and scatter them over the salad.

Whisk together honey, balsamic vinegar, olive oil, black pepper, and salt in a separate bowl.

Drizzle the dressing over the salad.

Gently toss the salad to combine all the ingredients.

Taste for seasoning and serve immediately or chill for up to an hour before serving.