I just take the easy route = moussaka instead of lasagne
Everything is precooked (mince/tom/onion/garlic combo, aubergine and courgettes), then layered into the pan. No potato or pasta.
I top it with blobs of cream cheese, grated cheddar and a sprinkle of parmesan (which crunchifies it)
Then reheat by baking in oven til cheese is golden crunchy and the filling is heated through.
Freezes magnificently.
It ain't the traditional recipe, but it is lovely, and I don't regret losing the carbs at all.
I always think that making a low carb alternative may lead to disappointment, but making a new dish that combines the best low carb bits of various dishes, is bound to be a triumph. But then, I don't follow instruction well.