Something like thai curry?
I make it with butternut squash and other veg - usually brocolli, courgettes, carrots, and you can bulk it out with chickpeas (good for protein and lowering the overall GI score).
What I do is: parboil butternut squash (not essential, but speeds up process).
Dry roast (so in hot pan), about 1/4 each of cumin and coriander seeds. Set aside when they start smelling. Then, fry onion, minced garlic, chilli and ginger in oil (usually sesame) until the onion is clear (for amounts, I would say 1/2 onion per person, then garlic etc. to taste). Then, add in rest of chopped veg and cumin and coriander seeds, stir fry until partially cooked. Pour in a can of coconut milk (can be half/half with stock to be less fatty) and then leave to cook down. Serve with naan breads or wild rice and chutney. Add salt and pepper as required.
You can also do baked potatoes, leaving off butter, and having with baked beans or tuna (this lowers the GI score of the baked potato), with salad.
Oven roasted or poached salmon with wild rice and vegetables.
A giant salad with various vegetables, with say edamame beans, green peas, tuna, sweetcorn, cucumber etc., with french dressing.