Wash and dry spinach leaves thoroughly, remove tough stems
Wash, hull, and thinly slice strawberries
Thinly slice red onion into half-moons (soak in cold water for 10 minutes to reduce sharpness if desired)
Toast pecans at 350°F for 8-10 minutes, let cool, then roughly chop
In a large bowl, place spinach, strawberries, and red onion
Add some poppy seed dressing and toss gently to combine
Add pecans and crumbled feta, toss lightly
Season with salt and pepper to taste
Add more dressing if needed
Serve immediately