Strawberry Spinach Salad

In a large bowl, whisk the lemon juice with the mustard. While whisking, slowly pour in the oil until the dressing is combined. Season with salt and pepper.  Add spinach, chicken, strawberries, ½ cup pecans, and onion to the bowl with the dressing and toss to combine.  Pile salad onto plates and top with the remaining pecans and a generous crumbling of feta.