Two kinds of mustard make all the difference in this sheet-pan dinner. Dijon mustard mixed with honey serves as a sweet-tart marinade for the chicken, while the whole seeds in old-style mustard add pops of crunch and flavor to the dressing.
- 2 Tbsp. Dijon mustard
- 2 Tbsp. plus 2 tsp. honey
- 1/3 cup plus 3 Tbsp. extra-virgin olive oil, divided
- 4 whole chicken legs (thigh and drumstick; about 2 lb. total), patted dry
- 2 1/2 tsp. kosher salt, divided
- 1 tsp. freshly ground black pepper, divided
- 1 1/2 lb. baby Yukon Gold potatoes, halved
- 4 rosemary sprigs
- 1 garlic clove, finely grated
- 3 Tbsp. fresh lemon juice
- 4 tsp. whole grain mustard
- 1 small head of frisée or 1/2 small head of escarole, trimmed, torn into bite-size pieces
- 1/2 cup parsley leaves
- Place a rack in top third of oven; preheat to 375°F. Whisk Dijon mustard, 2 Tbsp. honey, and 1 Tbsp. oil in a medium bowl to combine. Season chicken on all sides with 1 tsp. salt and 1/2 tsp. pepper. Transfer to bowl with honey mustard and toss to coat.
- Toss potatoes, 2 Tbsp. oil, 1 tsp. salt, and remaining 1/2 tsp. pepper on a rimmed baking sheet. Arrange chicken legs (skin side up) in the center of pan; discard excess marinade. Arrange potatoes around outside of pan in an even layer, then turn cut side down (this will help them brown better). Arrange rosemary over potatoes. Roast until chicken and potatoes are golden brown and an instant-read thermometer inserted into thickest part of chicken registers 165°F, 30–40 minutes.
- Whisk garlic, lemon juice, whole grain mustard, and remaining 1/3 cup oil, 2 tsp. honey, and 1/2 tsp. salt in a small bowl. Divide chicken and potatoes among plates, then arrange frisée and parsley alongside potatoes. Drizzle dressing over chicken, potatoes, and frisée.
- Do Ahead: Chicken can be marinated 8 hours ahead. Cover and chill.