Bring a large pot of well salted water to a boil.
In a large, deep skillet heat 1 tablespoon olive oil over medium high heat. Once the oil is shimmering, sprinkle the chicken thighs with salt and pepper and saute them for 2-3 minutes per side, or until lightly browned. Remove the chicken from the pan.
Add the second tablespoon of olive oil to pan and begin cooking the onions. Add a sprinkle of salt and saute them until they are soft, about 5-7 minutes.
Deglaze the pan with brandy, wait 10 seconds, then add the wine bring to a boil. Boil about 30 seconds and pour in the chicken stock. Add the carrots and parsnips. Tie the thyme, bay leaf, and parsley together with some kitchen string and add it to the skillet (or make a bag from string and cheesecloth). Return the chicken to skillet. Bring to a boil and then lower the heat until you have low simmer. Simmer, partially covered for 20 minutes, or until the chicken is cooked through and the vegetables are soft.
Once the fricassee is almost done, add the egg noodles and cook according to package directions. Drain the noodles, keeping 1 cup of the water. Add the noddles back to the pot with the water.
Remove the chicken and vegetables to a bowl. Remove and discard the herbs. Bring the sauce to a boil and let boil for 5 minutes to reduce it a little. Mix together the cream and egg yolks in a bowl. Take the skillet off the heat. Then begin adding a little of the sauce to the egg yolk mixture while whisking continuously. Continue until you have added about 1 cup of the sauce to the eggs. Then pour the eggs into the skillet while whisking again. While still whisking, bring the sauce back to a very gentle simmer and then take the skillet off the heat.
Whisk the butter into the sauce and then add back the chicken and vegetables. At this point you can either combine the noodles and fricassee into one pot and warm them together or pour some of the sauce over the noodles but keep the two parts the dish separate. Garnish with fresh parsley.