Place butter, olive oil, 1 tablespoon of the miso paste, 2 tablespoons tamari, ginger and garlic in a small bowl. Mash together well. Stir through the shallots.
Preheat oven to 180C fan-forced. Place a large baking tray with baking paper. Line broccolini and asparagus onto prepared tray.
Dot broccolini and asparagus with the miso mixture. Roast for 10 minutes. Turn oven off and leave in there for further 5 minutes.
While this is cooking, prepare noodles as per packet directions. Drain well but save half a cup of noodle water and pop back into the saucepan. Stir through 1 tablespoon of miso paste plus the hoisin sauce and tamari.
Place noodles in a large bowl. Add broccolini mixture and extra sauce. Toss well to combine. Sprinkle with toasted sesame seeds and serve.