Season the pork with salt and pepper. In a mixing bowl, whisk the cumin and olive oil together. Place the meat in a glass baking dish. Pour the marinade over the meat and marinate for 2 hours, under refrigeration. Sear in a hot cast iron skillet over very high heat for 2 minutes on each side. Remove from the pan and allow to rest for a couple of minutes. Melt 3 tablespoons of the butter in a heavy saucepan. Add the onions and saute for 4 minutes, or until softened. Add the rice and cook for 3 minutes, stirring with a wooden spoon. Add the wine and bring to a boil. Add 1/2 cup of the stock and stir vigorously with a wooden spoon and allow to simmer and evaporate before adding more broth. Continue cook, adding broth as needed. After 15 minutes, begin tasting for correct doneness-firm but tender. Add the remaining 3 tablespoons of butter, the mushrooms and roast pork. Season with salt and pepper. Mix thoroughly. Garnish with thyme, parsley and the fried quail eggs.