Step 1

Heat medium (20cm base) non-stick frying pan over medium heat; cook onion and garlic, stirring, about 10 minutes or until onion is browned lightly.

Step 2

Meanwhile, boil, steam or microwave potato, asparagus and zucchini, separately, until tender; drain.

Step 3

Whisk eggs, egg whites, milk and herbs in medium jug; season.

Step 4

Add potato, asparagus and zucchini to pan. Pour egg mixture over vegetables; sprinkle with peas. Reduce heat to low; cook, uncovered, about 10 minutes or until frittata is almost set. Sprinkle with cheese.

Step 5

Preheat grill (broiler).

Step 6

Grill frittata about 2 minutes or until set. Stand frittata in pan 5 minutes before serving sprinkled with dill.