Your later meals should be Pro + Fat. Do NOT neglect your fats as they are essential to your body. You should be getting at least 20% of your diet in fats, otherwise you are shooting yourself in the foot.
You want to make meals either Protein + Carbs (Under 10g fat), or Protein + Fat (Under 10g carbs). Most people make thier Pro + Fat meals later on in the day and taper off the carbs as the day goes on.
Good sources of fats are Nuts (Peanuts, Macadamia, etc..),
Natural Peanut Butter, Fish and Fish Oils (Gotta have your omega's), Flax seeds/oils, Olive/Canola Oil and many others.
If you want to
build muscle and gain weight, do not shy away from the carbs, just make sure you do not combine carbs and fats in the same meal =)