I dieted after lo was born and ate either fish or meat roasted on veggies (tomatoes, corgettes, peppers, peas) and had it with salad. I roasted in lemon juice so no oil.
I would think lo would be ok with this as a meal too? You may want to add in some carbs tho - rice, bread or potatoes.
You could do a sauce separately and just have a little for yourself and more for lo. A sauce could last a few days too saving time
Generally I guess you could have meat or fish with veggies in different herbs for flavour and to give some variety.
Cous cous and quinoi (not sure how to spell that) are lovely and healthy too!