In a large mixing bowl, combine mixed salad greens, strawberries, orange segments, cucumber, and red onion.

In a smaller bowl, whisk together olive oil, orange juice, lemon juice, honey or maple syrup, salt, and pepper until well-emulsified.

Drizzle the vinaigrette over the salad ingredients and toss gently until everything is evenly coated.

Sprinkle feta cheese and toasted walnuts or pecans over the top and toss lightly.

Transfer to a serving bowl, optionally drizzle with extra vinaigrette, and serve immediately.