Milchig:
Baked Potatoes with slices or chunks of cheese melted into them with butter as well.
Wacky Mac with peas on the side.
Cheese Sandwiches with sliced tomatoes on them (or on the side- nobody eats an entire tomato at once so these can easily be shared. You can use oil to grill fry the sandwiches, although that won’t be as healthy, you can get instructions for how to do that online.
Parve:
Peanut Butter and Jelly with baby carrots as a side dish.
Fleishig:
Rotisserie Chicken with peas as a side dish.
*If you buy frozen vegetables, you can reheat them later when you plan on eating them.
** I am sure that there are some kosher protein bars you can purchase for around $1.00 to make sure you get more nutrients as well.