Pre-heat the oven to 400 degrees.
Whisk the eggs, cheese and thyme together in a small bowl. Set aside.
Pre-heat a large skillet with oil over medium high heat.
Add the onions and cook until soft and translucent (approx. 6-7 minutes).
Add the garlic and cook until fragrant (approx. 1 minute)
Add the zucchini and cook until soft (approx. 6-7 minutes).
Evenly arrange the vegetables on the skillet.
Pour the egg mixture over the vegetables and cook for 2-3 minutes.
Transfer the oven proof skillet to the oven and bake for 14-15 minutes until the middle is set.
Serve immediately or refrigerate and enjoy for up to 3 days.
Top with salt and/or pepper, to taste.