Preheat oven to 350°F. Grease a 9" pie dish with butter or spray lightly with oil.
Whisk eggs, cream, salt and pepper.
Scatter most of the ham, cheese and green onion in the pie pan.
Pour in egg mixture. Top with remaining ham, cheese and green onion.
Bake 35 minutes until golden on top and center barely wiggles. Don't overcook, it will lose custardy-ness.
Remove from oven, rest 5 minutes and watch it deflate!
Cut then serve with a simple side salad, or stuff into soft rolls, or wrap into burritos (then pan fry to crisp!)