ur best bet is to start here
http://www.bodybuilding.com/exercises/then
Meal 1
6 egg whites, 1 yolk, 1 slice low fat cheese, 3oz oats, 1 banana, 1 cup of low fat milk, 1 scoop whey protein powder.
Meal 2
5oz tuna in water, 1 whole wheat bagel, 1 tablespoon low fat mayo, lettuce and tomato.
Meal 3
8oz grilled chicken breast, 1 baked potato, 2 cups salad, olive oil dressing.
Meal 4
Sandwich with 4oz turkey breast, 2 slices whole wheat toast, 2 slices low fat cheese and tomato. 1 cup of low fat milk or a yogurt.
Meal 5
6oz grilled steak, 1.5 cups brown rice, 2 cups salad or vegetables.
Meal 6
6oz cottage cheese, half cup almonds, 1 scoop whey protein.
Follow the above bodybuilding diet plan and remember, as you grow bigger, make sure you eat more calories!
http://www.bodybuilding.com/fun/bbinfo.php/?page=MassGainDiets