I put olive oil into the tray (sometimes with whatever spice I want) , with sausages & sweet potato, put that in the oven, then in a big bowl i put the veg (courgettes, tomatoes, peppers, onions, mushrooms.... Anything available) add chopped garlic, lemon juice, more olive oil & balsamic glaze, mix it up then put it on top of the already slightly baked sausage/chicken & sweet potato. Keep turning it regularly.
For the cous cous, I sautee the vegetable trimmings (onion, peppers, courgettes, tomatoes) add lemon juice and whatever spice I want, add tomato puree & sultanas..... Cook on a really low heat, 5 mins before the tray bake is ready I add the dried cous cous, water (1 & 1/4 ratio) leave for 4 mins, add butter, leave for 2 min then mix thoroughly.
Voilà!
Its the easiest thing in the world really, just use up what you have in the cupboard.... Today I had forgotten to but sweet potato so just cut normal red potato's that needed using up into wedges.....