
Roast Chicken and Root Vegetables with Mustard-Rosemary Sauce
A rustic yet elegant one-pan meal featuring golden roast chicken, caramelized vegetables, and a silky mustard-rosemary pan sauce.
Ingredients (Serves 4–6)
For the Roast Chicken
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1 whole chicken (3½–4½ lbs), patted dry
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2 teaspoons kosher salt
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1 teaspoon freshly ground black pepper
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2 tablespoons olive oil
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1 tablespoon Dijon mustard (to rub under the skin)
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3–4 garlic cloves, smashed
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1 lemon, halved
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2–3 sprigs fresh rosemary
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2–3 sprigs fresh thyme (optional)
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1 small onion, quartered (to stuff inside the cavity)
For the Root Vegetables
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4 carrots, peeled and cut into 1-inch chunks
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2 parsnips, peeled and cut into 1-inch chunks
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2 medium potatoes or 1 large sweet potato, cubed
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1 small fennel bulb, sliced thickly (optional but wonderful)
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1 red or yellow onion, cut in wedges
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2 tablespoons olive oil
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Salt and pepper to taste
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1–2 teaspoons chopped fresh rosemary
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½ teaspoon paprika (optional for color)
For the Mustard–Rosemary Sauce
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½ cup dry white wine or chicken broth
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½ cup chicken stock (additional)
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2 tablespoons Dijon mustard
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1 tablespoon whole-grain mustard
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1 tablespoon fresh rosemary, very finely chopped
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1–2 teaspoons lemon juice
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1 tablespoon butter (to finish)
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Salt and pepper, to taste
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Optional: 1 tablespoon cream or crème fraîche for a richer sauce
Instructions
1. Prepare the Chicken
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Preheat oven to 425°F (220°C) or 400°F (205°C) convection.
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Remove giblets and pat the chicken very dry inside and out.
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Rub olive oil all over the skin.
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Season generously with salt and pepper, including inside the cavity.
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Rub 1 tablespoon Dijon mustard under the breast skin for subtle flavor and moisture.
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Stuff the cavity with:
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Smashed garlic
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Lemon halves
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Onion pieces
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Rosemary and thyme sprigs
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Tie legs loosely with kitchen string.
2. Prepare the Root Vegetables
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Toss carrots, parsnips, potatoes, fennel, and onion with:
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Olive oil
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Salt and pepper
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Chopped rosemary
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Paprika (optional)
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Spread evenly in a large roasting pan or cast-iron skillet.
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Create a small space in the center for the chicken.
3. Roast the Chicken
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Place the chicken breast-side up on top of the vegetables.
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Roast for 1 hour to 1 hour 15 minutes, depending on size.
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Convection: Check at 50–55 minutes.
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Baste with pan juices halfway through.
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Chicken is done when:
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Internal temp = 165°F (74°C)
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Juices run clear
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Skin is crisp and deeply golden
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Transfer chicken to a cutting board, tent loosely with foil, and rest at least 10–15 minutes.
Leave vegetables in the pan while you make the sauce.
4. Make the Mustard–Rosemary Sauce (Pan Sauce Method)
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Remove vegetables to a warm holding bowl.
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Place roasting pan on stovetop over medium heat.
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Add white wine or ½ cup broth to deglaze, scraping all browned bits.
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Allow it to reduce by half (2–3 minutes).
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Add the remaining chicken stock.
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Whisk in:
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Dijon mustard
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Whole-grain mustard
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Finely chopped rosemary
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Simmer gently for 3–5 minutes until slightly thickened.
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Turn off heat and whisk in 1 tablespoon butter (and cream if using).
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Add lemon juice to brighten.
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Taste and adjust seasoning with salt and pepper.
5. Carve and Serve
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Carve chicken into legs, thighs, wings, and breast slices.
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Arrange roasted vegetables on a platter.
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Place chicken pieces on top or alongside.
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Spoon warm mustard-rosemary sauce generously over everything.
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Serve additional sauce on the side.
Serving Suggestions
This dish pairs beautifully with:
Side Dishes
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Yorkshire pudding or crusty bread (to mop up sauce!)
Wine
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A light Pinot Noir
Tips & Variations
✔ For Extra Crisp Skin
Pat the chicken dry and leave uncovered in the fridge overnight.
✔ Add More Vegetables
Try turnips, celery root, rutabaga, or Brussels sprouts.
✔ Make It Creamier
Add ¼ cup heavy cream or crème fraîche to the sauce at the end.
✔ Make It More Rustic
Use whole small carrots and baby potatoes.
✔ Extra Herb Depth
Add thyme or a small amount of sage alongside rosemary.
- 1/3 cup whole grain Dijon mustard
- 1/3 cup olive oil
- 2 1/2 tablespoons chopped fresh rosemary
- 1 7 1/2- to 8-pound roasting chicken, rinsed, giblets removed
- 2 large red onions, each cut into 8 wedges, peeled
- 1 1/2 pounds small turnips, peeled if desired, each turnip cut into 1 1/2-inch pieces
- 1 pound peeled baby carrots
- 1 cup canned low-salt chicken broth
CONVECTION OVEN RECIPE INSTRUCTIONS
Meanwhile, brush large baking sheet with oil.




