Prep Dish: Preheat the oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish or a shallow 3.5-quart oven-safe braiser or pan. In the prepared dish, combine the rinsed rice, garlic, Dijon mustard, lemon zest, lemon juice, 3/4 teaspoon of the Italian seasoning, 1/2 teaspoon of the salt, and some black pepper. Mix well to evenly distribute everything.
1 cup uncooked basmati rice,, 8-10 fresh garlic cloves,, 2 Tablespoons Dijon mustard, zest of 2 lemons, 3 Tablespoons fresh lemon juice, 1 teaspoon Italian seasoning,, 1 1/2 teaspoon Morton kosher salt,, fresh cracked black pepper, 2 Tablespoons olive oil
Add Chicken, Liquid, & Butter: Nestle the chicken thighs into the rice mixture in a single layer. Season the chicken with the remaining salt, remaining Italian seasoning, and additional black pepper. Pour the warm chicken broth into the dish around the chicken, being careful not to wash off the seasoning. Evenly distribute the cubed butter and, if using, arrange the lemon slices over and around the chicken.
1 1/2 pounds boneless skinless chicken thighs, 1 3/4 cups chicken broth, 1 lemon,, 2 Tablespoons unsalted butter,