
Preheat your oven to 375°F (190°C).
In a large oven-safe skillet, heat olive oil over medium heat. Add asparagus and zucchini; cook for 3–4 minutes until just tender.
Stir in spinach, cherry tomatoes, and green onions; cook for another 2 minutes until spinach wilts.
In a large bowl, whisk together eggs, milk, salt, and pepper until well combined.
Pour the egg mixture evenly over the vegetables in the skillet. Sprinkle with goat cheese, Parmesan, chives, and parsley.
Cook on the stove for 3–4 minutes until the edges start to set.
Transfer the skillet to the oven and bake for 12–15 minutes, or until the center is set and puffed.
Let the frittata cool for 5 minutes before slicing and serving.