Mound sifted flour and create well in middle. Add eggs, milk, and salt to the well. Combine into a stiff dough
Roll dough thin on liberally floured surface and cut into thin strips. Cut strips into 1-2" lengths
Allow noodles to dry on floured surface for 2 hours
While noodles are drying, add whole rotisserie chicken with stock to a stockpot on the stove. Cut onion in half and add this as well. Simmer gently for the 2 hours the noodles are drying
While the stock is simmering, boil 3 lbs of potatoes in their skins until fully cooked. Drain, peel off skins, and smash with potato masher, adding 1/2 cup milk and 4 tbsp of butter, or however much it takes to get the potatoes to the consistency you like. Do *not* use instant. Keep warm.
Remove rotisserie chicken and onion pieces from stock. discard onion pieces. strip and discard skin from chicken. remove meat from chicken carcass, cut into bite-sized pieces and add back to stock
10 minutes before serving, add dried noodles and the flour from the surface they were drying on to the chicken and stock mixture. Bring to a boil and cook the noodles. The stock will thicken to a gravy while the noodles cook
To serve, add mashed potatoes to a wide plate or bowl. Season with butter, salt, and pepper. Add noodles and gravy on top of the mashed potatoes and season again.
Eat, then go work in a field for 12 hours or so.