HELP!!Do you have any ideas for a healthy dinner or food for a overweight 3 year old?

she drinks 2% milk, i rather 1%, but i buy the organic kind with the omega-3, they only carry the whole or 2%, no skim. She drinks 2 8 oz daily, one in the morning and one in the evening when we get home from school and work at 7:30pm. I need some healthly easy to prepare meals for her, she can be very picky and my go to food is the hebrew all beef hot dogs and veggies, or lunchable because i don't have time to fix a real meal at night because we get home so late everyday, traffic is a killer here in the DC METRO AREA. ANY TIPS