how long can you marinate chicken in italian dressing
1 After the hour of marinating, turn chicken breasts over and sprinkle evenly with oregano and grated parmesan cheese. 2  Bake in a 350 degree oven for 1 hour (or until juices run clear), checking after 45 minutes to make sure they do not get over-cooked.irections. 1  In a glass 9 x 11 baking dish, place cleaned and trimmed chicken breasts, and season with salt and pepper, if desired. 2  Pour Italian salad dressing over to coat and let marinate in the fridge for 1 hour.