Premake the noodles and when ready to eat, cook them in plenty of salted boiling water.
Place parmesan into the Thermomix bowl. Mill 8 sec/speed 8. Set aside.
Place onion and Leek-Chi butter into the Thermomix bowl. Cook 5 min/Varoma/speed 1.
Add the buttery onions and zucchini to a large pot or frying pan, over a medium-high heat, Cook until starting to sizzle then add the cooked noodles, a cup of pasta water, peas, parmesan and lemon juice.
Toss well until combined. Taste and season as needed.
Add more Leek-Chi Butter if you wish.