Grilled Vegetable Pasta Sauce for 2 - Testing

0 - Would this benefit from some fresh herbs?

8 oz pasta
1/2 onion, sliced into 1/2" slices
4 small zucchini sliced into 1" strips
3 roma tomatoes sliced into 1" strips
4 garlic cloves, peeled, whole
1/4 cup olive oil
1 tsp grated lemon zest
Juice from 1 lemon
1 tsp salt
1/2 tsp black pepper
1/2 cup + grated parmesan

1. Pre-heat grill.
2. In a large bowl, whisk together oil, zest, juice, salt and pepper.
3. Add the zucchini and toss, to cover; marinade for 10 minutes before adding the tomatoes and garlic. To keep the onion slices intact, brush with the marinade, do not toss.
4. In a vegetable grilling pan, place the onion and the garlic. Grill at Medium Direct heat for a couple of minutes, lid closed.
5. Directly on the grill, place the zucchini slices (reserve the marinade). Cook everything another 4 minutes (lid closed) before adding the tomato to cook in the onion veg grilling pan (it can get quite soft). Cook for a final 4 minutes (lid closed).
6. Check doneness; if veg is soft, remove to cutting board, allow to cool until you can handle them, and cube small and put in a saucepan with the remaining marinade. Bring this to a simmer while the pasta cooks.
7. Once cooked, toss the sauce with the pasta.