Baked Penne with Chicken and Sun-Dried Tomatoes
6 tablespoons butter, plus more for baking dish coarse salt and ground pepper 1 Pound Penn rigate 1 teaspoon olive oil 2 boneless, skinless chicken breast halves (8 ounces each), halved horizontally 1/2 cup plus 2 tablespoons all-purpose flour (spooned and leveled) 4 garlic cloves, minced 6 cups whole milk 10 ounces white mushrooms, trimmed and thinly sliced 1/2 cup oil -packed sun-dried tomatoes, drained and thinly sliced 1 1/2 cups shredded provolone (6 ounces) 1 cup finely grated Parmesan (4 ounces) Preheat over to 400. Butter two shallow 2-quart baking dished. In a large pot of boiling salted water, cook pasta 3 minutes short of al dent; drain pasta, and return to pot. In a large nonstick skillet, heat oil over medium-high heat. Season chicken with salt and pepper; cook until opaque throughout, 3 to 5 minutes per side. Halve each piece lengthwise, then thinly slice crosswise. In a 5-quart dutch over or heavy pot, melt butter over medium. Add flour and garlic; cook whisking, 1 minut...