Preheat oven to 375ºF.
Saute onions with 2 tsp olive oil in pan until translucent.
Add 2 cups zucchini ribbons and eggplant noodles and continue heating until just soft.
Add a couple Tbsp low sodium broth to keep from sticking to pan (if necessary)
Remove from heat, drain well, set aside.
Heat garlic in 2 tsp of olive oil until slightly browned.
Add remaining zucchini ribbons and heat until just soft.
Remove from heat, set aside.
Take a frozen pie crust and brush a thin layer of dijon mustard.
Layer fresh mozzarella cheese on top.
Add layer of the zucchini, eggplant and onion mixture.
Top with layer of zucchini and garlic mixture.
In a bowl combine eggs, half & half and salt & pepper to taste until well-blended.
Add egg/cream mixture and distribute all over veggies, evenly.
Bake for 35 minutes until crust golden and quiche set.