Step 1

Preheat the oven to 425 degrees F. Melt the butter in a large ovenproof skillet over medium heat. Add the garlic and about three-quarters of the scallions and cook, stirring occasionally, until soft, about 2 minutes. Add the broccoli, chicken, rice, tomato, 1 teaspoon salt, and pepper to taste; stir to combine.

Step 2

Whisk the chicken broth and sour cream in a bowl, pour into the skillet and bring to a simmer. Stir in half each of the havarti and parmesan. Cover tightly with a lid or aluminum foil, transfer to the oven and bake until the rice is tender and most of the liquid is absorbed, about 20 minutes.

Step 3

Turn on the broiler. Uncover the skillet and sprinkle with the remaining havarti and parmesan, then broil until golden, about 2 minutes. Sprinkle with the reserved scallions.