In a large bowl, combine chicken thighs and basil pesto. Ensure the chicken is well-coated with the pesto. Allow it to marinate for about 15 minutes for enhanced flavor.
While the chicken is marinating, arrange halved cherry tomatoes and sliced red onion on a large baking sheet. Drizzle with olive oil and season with salt and pepper. Toss gently to combine.
After marinating, nestle the pesto-coated chicken thighs among the tomatoes and onions on the baking sheet.
Roast in the preheated oven for 25-30 minutes or until the chicken is cooked through (internal temperature should reach 165°F or 75°C) and the tomatoes are caramelized.
Remove the sheet pan from the oven and let it rest for a few minutes.
Garnish with fresh basil leaves and serve with lemon wedges on the side for a refreshing zest.
Notes
Allow the chicken to marinate for enhanced flavor.