- Preheat oven to 400 degrees F (200 degrees C). Line a baking sheet with aluminum foil. Generously season each rack of lamb with herbes de Provence, salt, and black pepper.
- Heat oil in a large skillet over high heat. Place lamb in skillet and cook, browning on all sides, 6 to 8 minutes. Transfer lamb to a foil-lined baking sheet; set aside.
- Stir pistachios, bread crumbs, butter, olive oil, and a pinch of salt and black pepper in a bowl. Spread mustard on the fat-side of each rack of lamb. Pat pistachio mixture on top of mustard. Bake in the preheated oven until the crust is golden and lamb is pink in the center, 20 to 25 minutes. Transfer to a plate and let rest 10 minutes before slicing.
This was everything it promised to be and my entire family was blown away. I stumbled across this recipe looking for pistachio-related things to make, and it turned out absolutely beautifully. The dijon mustard gave it a lovely tangy depth (and as an otherwise avowed mustard-hater, I would NOT leave this off or substitute it with anything else) and everything else crusted up just as promised.
Part of the reason I started baking was because I like my goodies to be less obviously sweet - I want to taste the flavor, not just the sugar. So most of these recipes will have the sugar dialed down.