Cook spaghetti in boiling salted water.
While spaghetti is cooking, thinly slice onion and zucchini.
In a wide pan, fry onion in hot oil until translucent. Add zucchini and fry together while stirring.
Add crushed garlic, lemon juice and Vegeta Natur. Add in the drained spaghetti.
Remove from heat, and serve sprinkled with grated cheese.
The dish will have a special aroma if you sprinkle it with toasted pine nuts.