Baked Penne With Farmhouse Cheddar and Leeks - With meat

1/4 cup butter 5 cups leeks , chopped (white and pale green parts only, about 5 large) 1/4 cup all-purpose flour 3 1/2 cups whole milk 1 lb extra-sharp[...]

1 red pepper, diced 4 cups pasta sauce 1 lb extra lean ground beef 8 ounces cheddar cheese , grated 12 ounces whole wheat penne, uncooked 1 Cook pasta[...]