01 - Heat a dry skillet over medium heat. Add pecan halves and toast for 3–4 minutes, stirring frequently until fragrant and lightly golden. Remove from heat immediately and transfer to a plate to cool completely.
02 - In a small mixing bowl, whisk together extra-virgin olive oil, balsamic vinegar, honey (or maple syrup), and Dijon mustard until emulsified. Season with salt and freshly ground black pepper to taste. Whisk again just before dressing.
03 - Place the washed and dried baby spinach in a large salad bowl. Add the sliced strawberries and thinly sliced red onion on top. Do not toss yet.
04 - Drizzle half of the vinaigrette evenly over the salad. Using salad tongs or large spoons, toss gently to coat all leaves without bruising the spinach.
05 - Sprinkle the toasted pecans and crumbled feta cheese (if using) over the dressed salad. Drizzle the remaining vinaigrette over the top. Toss lightly once more immediately before serving to maintain texture and freshness.