Grease the pie dish and pre-heat oven to moderate (180 degrees celsius, fan-forced).
Cook onion and bacon/ham in oil over medium heat for a few minutes.
Mix together with all other ingredients (except chives) until combined.
Pour into pie dish and bake for 45 minutes.
Garnish with chives and serve hot or cold.
Notes
Q. Can I freeze this quiche?You sure can. You could freeze it whole or in slices.Store in the freezer for up to 3 months.Q. How long will it keep?Stored covered in the fridge, your quiche will last 2-3 days.Q. What type of cheese works best in this quiche?I like cheddar, however you can also use Swiss, Gruyère, feta, goat, Parmesan or mozzarella.