Make the Chicken Marinade: In a large bowl, whisk together olive oil, lemon zest and juice, whole grain mustard, fresh thyme, grated garlic clove, salt, and pepper. Add the chicken thighs and toss to coat. Marinate for at least 30 minutes.
Roast the Carrots: Preheat the oven to 425°F. Prepare the carrots, place them on a parchment-lined baking sheet, drizzle with olive oil, and season with salt and pepper. Roast for 25–35 minutes until tender.
Make the Carrot Glaze: In a small pan, heat butter, honey, and grated garlic until bubbly. Remove from heat and set aside.
Start the Potatoes: Peel and cut potatoes into chunks. Boil in salted water until fork-tender. Drain and let steam evaporate. Keep warm for mashing.
Cook the Chicken: Sear marinated chicken thighs in a pan until golden and cooked through. Set aside.
Make the Pan Sauce: In the same pan, sauté shallot and garlic, then deglaze with white wine. Add chicken stock and Dijon mustard. Let the sauce reduce, then finish with cold butter until glossy.
Make the Mashed Potatoes: Mash potatoes or put through a ricer. Heat butter, cream cheese, and milk until melted. Stir into potatoes and season with salt.
Glaze the Carrots: Pour the honey butter glaze over the roasted carrots.
Make the Plates: Spoon mashed potatoes onto each plate, top with honey-glazed carrots, chicken thighs, and pan sauce. Garnish with fresh herbs and serve.
Notes
For a vegetarian option, substitute chicken with tofu or chickpeas for protein.