Parmesan Squash Bake

2 medium zucchini
2 medium buttern/summer squash
1 medium sweet yellow onion, diced
1/2-1 cup grated parmesan
1/4 cup extra virgin olive oil, divided
2 cloves garlic, minced
sea salt to taste

In a small pan, heat about 1 T of oilve oil. Fry the diced onion until it's soft, about 7 minutes. Add in the garlic and fry for another minute or so. Pour the onion mixture into the bottom of a 9x9 baking dish
Slice the zucchini and squash into thin slices. Layer them into 4 rows across in the dish, over the onions. Slowly pour the olive oil over the peices until they are evenly coated. Sprinkle with sea salt.
Bake in a preheated 350 degree oven for 30 minutes, uncovered. Pour the parmesan over the top of the dish. Bake for antoher 15-20 minutes, or until the vegies are soft and slightly golden brown.