Start by cooking the udon noodles according to package instructions. Usually, this involves boiling them in water for a few minutes until tender. Once cooked, drain the noodles and set them aside.
In a large skillet or wok, heat the toasted sesame oil over medium-high heat. Add the ground beef and cook until browned, approximately 5-7 minutes. Make sure to break up the meat with your spatula for even cooking.
Once the beef is cooked, add the butter to the skillet, allowing it to melt. Then, toss in the sliced shiitake mushrooms and sugar snap peas. Stir-fry the mixture for about 3-5 minutes until the vegetables are tender yet crisp.
Now, it's time to add the flavor! Stir in the soy sauce, seasoned rice vinegar, oyster sauce, and Sriracha. Remember, start with a smaller amount of soy sauce and adjust to your taste. Mix everything well to ensure the beef and vegetables are coated.
Add the cooked udon noodles to the skillet. Gently toss everything together, allowing the noodles to absorb the sauce and flavors. Cook for another 2-3 minutes, stirring frequently.
Once everything is well combined and heated through, remove the skillet from the heat. Serve your Yaki Udon in bowls, garnishing with thinly sliced green onions and a sprinkle of sesame seeds if desired. Enjoy your delicious homemade noodles!
