Lemon-Rosemary Chicken Thighs with Roasted Brussels & Caramelized Onions

By Dr Ernst
August 23, 2025

Ingredients

  • 6 bone-in, skin-on pasture-raised chicken thighs

  • 2 Tbsp avocado oil (or olive oil)

  • Juice of 1 lemon + 1 tsp lemon zest

  • 3 fresh rosemary sprigs (or 2 tsp dried)

  • 3 garlic cloves, smashed

  • 1 tsp sea salt

  • ½ tsp black pepper

  • 1 lb Brussels sprouts, halved

  • 2 Tbsp avocado oil

  • ½ tsp sea salt

  • ½ tsp smoked paprika

  • 2 large yellow onions, thinly sliced

  • 1 Tbsp avocado oil or coconut oil

  • Pinch of sea salt

DIRECTIONS:

  • Prepare the Chicken

    • Preheat oven to 400°F (205°C).

    • Pat chicken dry and rub with oil, lemon juice, zest, garlic, rosemary, salt, and pepper.

    • Place in a cast iron skillet or baking dish, skin side up. Roast for 35–40 minutes until skin is crispy and juices run clear.

  • Roast the Brussels Sprouts

    • Toss sprouts with oil, salt, and smoked paprika.

    • Spread evenly on a sheet pan and roast alongside the chicken for 20–25 minutes, until crispy on the edges.

  • Caramelize the Onions

    • In a skillet, heat oil over medium-low. Add onions and a pinch of salt.

    • Cook slowly, stirring occasionally, for 20–25 minutes until golden brown and sweet.

  • Plate It

    • Place a chicken thigh over a bed of roasted Brussels.

    • Spoon caramelized onions on top for a rich, sweet finish.

    • Garnish with a sprig of fresh rosemary or a squeeze of lemon.

Macronutrients

  • Protein: 30 g

  • Fat: 30 g

  • Carbohydrates: 16 g

    • Fiber: 6 g

    • Net Carbs:10 g

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