Pat lamb dry with paper towel/kitchen paper and if you like trim excess fat.
Combine crumbs, pesto, oil and parmesan - mix well to combine.
Firmly press crumb mixture on to fat side of lamb racks.
Lightly spray crust with olive oil/baking spray.
Bake in oven for 45 mins.
Notes
The lamb in the photo was baked for 45 mins and was medium. That's how we like to eat our lamb.Cooking times may vary depending on the size and/or weight of your racks.