Heat a 12" cast iron skillet and add the oil. When hot, add the onion.
Sauté the onion with the savoury, rosemary, parsley, nutmeg, cloves, and salt and pepper for 3-5 minutes, until translucent.
Add the meat and start browning.
When the meat is half-way cooked, add the oats, broth, bay leaves, Worcestershire sauce, and more salt and pepper, if desired.
Taste and adjust the seasonings, remove from heat and cool.
Preheat the oven to 400ºF. Grease a 12" pie plate and roll out the dough.
Line the pie plate with the dough, add the meat filling, and cover with the top crust.
Brush with egg wash and score.
Pop it in the oven for 45 minutes, or until the crust is golden brown.