Step 1

Arrange two racks to divide the oven into thirds and heat the oven according to the chicken tender package instructions.

Step 2

Divide 2 (8-ounce) boxes frozen chicken tenders among two rimmed baking sheets and bake according to package instructions. Meanwhile, place 1 1/2 cups marinara sauce, 1 tablespoon olive oil, and 1/4 teaspoon black pepper in a small saucepan. Stir to combine and bring to a simmer over medium-low heat. Taste and season with kosher salt as needed. Keep at a lower simmer until the chicken is ready.

Step 3

Remove the chicken from the oven. Increase the oven temperature to 450ºF. Meanwhile, spread the marinara sauce on the chicken tenders (about 1 tablespoon each), then sprinkle with 1 1/4 cups shredded mozzarella cheese (about 1 tablespoon each).

Step 4

Bake until the cheese is melted and the edges are crisp and browned, about 5 minutes.