For the dressing:
all ingredients except hazelnut oil
together. While whisking, slowly drizzle
in hazelnut oil. Season with salt and pepper, to taste. Set aside until ready to serve salad.
For the salad:
When ready to serve toss greens
, asparagus and vinaigrette
together, seasoning with salt and pepper. Place a generous handful on each salad plate, top greens with onions
and sprinkle with hazelnuts.