How about some Scandinavian type additions like smoked fish and dill sauce, or shrimp? Sautéed mushrooms would be good, too.
If you use any dry mixes, try just a bit and then taste. I think that they are so concentrated that a little bit would go a long way.
You could sauté some veggies that you like in olive oil, add a bit of left over cut up cooked meat, and put that on top. I would like the vegetables that I put in shepherd's pie - onion, cauliflower, green beans, and carrots. Olive oil is a "good" fat, and would probably be better for you than the lo fat stuff.
Egg salad on top would be good for you, too.