Prepare the veggies: slice the onions, carrots, green onion, Korean pepper, and cabbage into bite sized pieces.
remove the stems from the perilla leaves then roll it up and slice thin strips. Set aside.
Boil the blood sausage, and do not remove the blood sausage from the plastic wrap! Boil the entire thing for 5 minutes if refrigerated and 8 minutes if frozen. Then take it out and let it rest on the counter for 5-10 minutes. Note: the instructions on the packet will probably tell you turn off the heat after 5 minutes and to leave the blood sausage in the water for another 5 minutes. Don't do that. It will be too mushy by the time we are done stir frying. My method works better for this dish.
Remove the plastic wrap and cut the blood sausage into 1 inch pieces. Note: If you're familiar with soondae, you'll notice that the quality is not that great. The casing breaks easily and the filling can burst out- try your best to make clean slices but don't get too frustrated if you can't. It helps to cut them a little thicker.
Stir fry the onions and carrots in some oil on medium low heat for 3-4 minutes. I lightly salt them in the pan but you don't have to.
Add the cabbage and continue stir frying for a couple minutes over medium heat.Note: You can increase or decrease the amount of time spent on stir frying the vegetables depending on your preference. I like my veggies to be softened but still have a crunch to them. Stir fry longer if you prefer softer veggies.
Add the soondae, green onion, Korean pepper, and sauce.