For gluten free, grain free couscous, you can blitz cauliflower til its all grainy then saute in olive oil.

Do lentil burgers with different varieties of lentils, beans, or added vegies.
Nut loaf slices are yummy barbecued.
TVP burgers - I'm just mastering these.
Cook polenta with some chilli and olive bits, then grill big chunks of that.
Experiment with vegies: cabbage sliced lengthways, cos lettuce, broccoli with almond paste is delish.
Risotto balls (I thicken with psyllium, but I'm sure you have an alternative!)