Optional: Soak the red onion in ice water for about 10 minutes to mellow its sharpness, then squeeze out excess water.

In a large serving bowl, combine fresh spinach, sliced apples, red onion, toasted pecans, feta cheese, and dried cranberries.

In a mason jar, combine vegetable oil, apple cider vinegar, maple syrup, Dijon mustard, garlic powder, salt, and pepper. Shake well to combine.

Pour the dressing over the salad mixture and toss gently until all ingredients are coated evenly.