Gochujang Noodles

Name: Gochujang Noodles
Ingredients: 1 pack (200g) udon noodles; 1-2 green onions; 1/2 tbsp chili oil (or vegetable oil); 3.5 oz (100g) ground pork (or ground chicken); Kosher salt and black pepper, to taste; Any kind of greens (such as microgreens, lettuce, etc.), to garnish; Generous pinch of toasted sesame seeds, to garnish; 1 tbsp Korean chili paste (gochujang); 1/2 tbsp soy sauce; 1/2 tbsp oyster sauce; 1 tbsp Korean chili pepper flakes (gochugaru); 1/2 tbsp sugar; 1 tbsp mirin; 1 tsp toasted sesame oil; 2 tbsp water