Preheat oven to 450 F. Toast pecans for 3 mins. Let cool.
Step 2
Cut a red onion in quarters and slice one quarter very thin.
Step 3
In a small bowl whisk together the oil, vinegar, salt and pepper to taste (for me this is a couple good pinches of salt and several good cracks of pepper).
Step 4
In a large bowl combine the spinach, red onion, toasted pecans and crumbled feta (I like to crumble the feta super large). Add half of the vinaigrette and gently toss the salad. Serve the rest of the dressing on the side. Serve immediately! You can always prepare the salad without the dressing for up to a day in advance, just add dressing before serving.