Start by whisking together the balsamic vinegar and honey in a bowl until well combined.
Thoroughly rinse the fresh baby spinach under cold water to remove any dirt or debris. Pat it dry with paper towels or use a salad spinner.
Hull and slice the strawberries into thin pieces. Rinse the blueberries.
In a large mixing bowl, add the baby spinach, sliced strawberries, blueberries, crumbled feta cheese, and toasted pecans. Gently toss everything together.
Drizzle your prepared balsamic dressing over the salad just before serving. Toss again gently to coat all ingredients evenly.
Transfer your beautifully mixed salad to a serving platter or individual bowls.