Here are a couple healthy dinner choices:

350-500 calories

1. 6oz-8oz grilled/baked fish, squeezed lemon with dill
2. 1/2-full sweet potato
3. Serving of steamed broccoli, tablespoon of grassfed butter or olive oil

OR

1. 6oz-8oz grilled/baked chicken, pick a healthy dry rub
2. Spinach salad, peppers, tomato, carrots, etc.
3. Chopped apple or pear on top
4. Topped with an olive oil vinegar dressing

I like to approach a healthy dinner with the idea of a simple protein and a side of vegetables.  With allergies and dressings aside, a large serving of vegetables is a great choice.  Try not to add excess marinades, dressings, and other additives to meals.  The best practice is keeping the ingredient list simple on all of the nutritional labels.