Cut onion and carrot into thinly. Cut green onion 1 inch long pieces, cabbage 0.5 chunks, and shiitake mushrooms into 1 inch size pieces. Cut meat (I use thinly pork belly here) into 1 inch (2.5 cm) pieces.
Use a medium sized pan and turn the heat to medium low.*1 Cook the pork belly first. Cook both sides well. Move to a side of the pan.
Add the cut onion to the pan (empty side) and cook with medium heat until the onion gets softer and the color turns clear.
Mix with the pork belly and stir for about 1 minute.
Add carrot, green onion, cabbage, and shiitake mushrooms into the pan. Turn the heat to medium low and cover with a lid and cook for 5 minutes.*2
Open the lid and turn the heat to higher. Then add Udon and the sauce ingredients (soy sauce, sake, sugar, dashi powder) and cook for 3 minutes while stirring.
Turn the heat off!