Boil broccoli and sweet corn. Cut sweet potatoes in cubes and sprinkle them with olive oil, salt and pepper. Heat up the oven and put it in to bake on 200 till ready.
Cut all the other vegetables in cubes, and mix it with the boiled vegetables.
Make a dressing. Mix olive oil, mustard, tahini, honey, chilli pepper, and lemon juice. Mix it until homogeneous.
Mix everything together and add the dressing.