Pre-heat the oven to 450
Mix the spices together and set aside.
In a large bowl, toss the meat, potatoes, carrots and onion with the oil. Then add the spice mix and toss until well mixed.
Add the food to your skillet and put the skillet in the oven. Set your timer for 10 minutes and then turn the oven down to 350.
Cook until the potatoes are tender, about another 20 minutes. Stir gently at least once.
Take the skillet from the oven and add the butter and toss again until the butter is melted and all over everything. Sprinkle with parsley if desired.