Let’s bring this dish to life with some easy-to-follow steps:

1. Preheat your oven to 400°F (200°C). Line a large baking sheet with parchment paper for easy cleanup.
2. In a large bowl, combine the chicken thighs, grapes, and sliced fennel.
3. Drizzle with olive oil and balsamic vinegar, then sprinkle with salt, pepper, and rosemary. Toss everything together until the chicken and vegetables are well-coated.
4. Arrange the chicken thighs skin-side up on the prepared baking sheet. Spread the grapes and fennel around the chicken, ensuring even distribution.
5. Place the lemon slices over the chicken and veggies for an extra burst of flavor.
6. Roast in the preheated oven for 35-40 minutes, or until the chicken is cooked through and the skin is golden brown. You’ll know it’s ready when the internal temperature reaches 165°F (75°C).
7. Let the dish rest for a few minutes before serving. This allows the juices to redistribute, ensuring every bite is juicy and flavorful.

This dish, much like the ones my grandmother would make, is all about letting the ingredients speak for themselves. The balance of flavors is a delightful surprise, much like the first time I tasted Moroccan tagine on my travels.