Roasted Morel-Rubbed Chicken With Charred Lemon, Asparagus, and Potatoes

Ingredients

• 1 (3 1/2–4) lb. chicken, backbone removed, chicken halved
• Kosher salt and freshly ground black pepper, to taste
• 1 oz. <a href="http://kalustyans.com/">dried morel mushrooms</a>
• 6 tbsp. olive oil
• 1 tsp. dried thyme
• ¹⁄₂ tsp. ground mustard
• ¹⁄₈ tsp. cayenne
• 1 tsp. <a href="http://www.znaturalfoods.com/">dried carrot powder</a>
• 1 lb. baby Yukon Gold potatoes
• 2 lemons, sliced 1/4" thick, seeds discarded
• 1 lb. asparagus, trimmed
• 8 oz. fresh morels, cleaned, trimmed, and halved lengthwise
• 1 tsp. fenugreek seeds