Step 1

Preheat the oven to 425 (220C) degrees.

Step 2

Season the chicken generously on both sides with salt and black pepper.

Step 3

Put a large (12-14-inch) ovenproof skillet or saute pan over medium-high heat. Add the olive oil, onion and 1 teaspoon salt. Cook the onion until it's softened and translucent, 2-3 minutes.

Step 4

Add the garlic, anchovies, oregano, fennel seed and crushed red pepper to the pan. Cook 1-2 minutes, stirring frequently, until fragrant.

Step 5

Stir in the tomatoes and roasted red peppers. Bring the sauce to a simmer, then arrange the chicken on top of the sauce and turn off the heat. Transfer the pan to the oven and bake 15 minutes.

Step 6

Flip the chicken breasts over. Sprinkle the cheese evenly on top of the chicken and bake 5 more minutes, until the cheese is melted.

Step 7

Sprinkle the basil over the chicken and serve.