Prepare all the ingredients by washing and cutting the vegetables mince garlic, cut bacon into half inch by 2 inches pieces Julienne the carrots, cut the mushrooms into slices that are 1/8 inches thick Separate the bok choy leaves/stems and cut them in half and then cut the green onions with thin bias cuts.
On a saute pan large enough to hold set over medium-high heat, add vegetable oil as well as the minced garlic. Cook for around 30 seconds or so until it becomes fragrant, but not before it begins to turn brown.
Then add the bacon strips to the pan and cook for approximately 3 minutes or until it gets crispy and begins to brown. Stir often. Once the pork belly has cooked, drain the any excess oil by using the help of a spoon.
Add the chopped carrots, mushrooms and bok choy into the large pan , and stir.
A small dish mix oyster sauce, soy sauce, mirin as well as the dark brown sugar. Sprinkle this sauce over the large skillet and stir until the meat and vegetables are completely covered with the sauce. Turn the heat down to medium and cover it with lid and cook for 2 or three minutes. Take off the lid and look for signs that the vegetables have been softened.
Mix in the cooked noodles, and cook for a further minute, so that the noodles get warm. Add the chopped green onions on top of the yaki udon.
Serve immediately.