- Preheat oven to 325°F (160°C).
- In non-stick skillet, heat oil over medium heat. Add onion and garlic; cook until onion is tender. Add zucchini; cook, stirring, for 5 minutes.
- In bowl, combine cheese, parsley, eggs, spinach, salt, pepper and nutmeg; stir in zucchini mixture.
- Spoon into lightly greased 9-inch (23 cm) pie plate.
- Bake in preheated 325°F (160°C) oven until set but still moist in centre, 35 to 45 minutes. Serve hot or cold.
Tip: Frittata can also be cut into small squares and served warm or cold as hors d’oeuvres.