Step 1: Prepare the Dressing

1. Combine balsamic vinegar, honey, and olive oil in a small mixing bowl.
2. Whisk the mixture until it becomes smooth and well blended.
3. Season with salt and black pepper to taste, adjusting the honey or vinegar to achieve your preferred balance of sweetness and tanginess.

Step 2: Toast the Pecans

1. Heat a small skillet over medium heat.
2. Add the pecans to the skillet and toast them for 3-4 minutes, stirring occasionally.
3. Remove from the heat once the pecans are fragrant and slightly golden. Let them cool.

Step 3: Assemble the Salad

1. Spread the baby spinach evenly in a large salad bowl as the base.
2. Arrange the blueberries, raspberries, and mandarin orange segments over the spinach.
3. Sprinkle the toasted pecans and crumbled feta cheese on top for added crunch and creaminess.

Step 4: Add the Dressing

1. Drizzle the honey-balsamic dressing evenly over the salad.
2. Gently toss the ingredients to ensure they are well coated with the dressing.