You can run cold water over the chicken until it's completely thawed.
Then pat dry with paper towels.
Preheat oven to 375-400 degrees.
Spray some non-stick cooking spray on some tin foil and place in a baking dish.
i know you said that you wanted "Plain chicken" but I would recommend at least rubbing the chicken breasts with some olive oil and adding some spices of your choice to give it some flavor.
Depending on the thickness of the breasts and your oven, you'll need to cook anywhere from 45 minutes or longer.
Just check the chicken periodically by cutting the center of the chicken breasts until it's easy to cut and not pink inside.
A faster way to cook the chicken once it's thawed is to fry it on the stove with some olive oil and spices.
Those are a few of the most basic tips that I can give you.
Good luck & enjoy!