Combine all sauce ingredients in a bowl. Set aside your green onions, red bell pepper, and sesame seeds for garnish.
In a pan over medium heat, melt the butter and add ground pork. Cook until browned and slightly crispy, then add the minced garlic. Sauté for 30 seconds until fragrant.
In a separate pot, boil the udon noodles according to package instructions. Drain well.
Add the cooked noodles to the pan with the pork and pour in the sauce mixture. Turn the heat to low and toss until everything is evenly coated and glossy.
For that Gyu-Kaku flair, heat a stone bowl over the stove until scorching hot. Add the noodles and listen for that satisfying sizzle.
Top with green onion, red bell pepper, and sesame seeds. Serve immediately.
