Peanut Butter Noodles

Name: Peanut Butter Noodles
Ingredients: 2 servings junghwa myeon (중화면) or jjajangmyeon noodles (or udon, spaghetti noodles); 2 green onions, divided; 3 cloves garlic; 1/2 tsp (2g) grated ginger; 1/2 cucumber (or cilantro), to garnish; 2 tbsp roasted peanuts (optional); 1 tbsp neutral-tasting oil (such as canola, vegetable oil, etc.); 3 tbsp creamy peanut butter; 1 tbsp soy sauce; 1 tbsp oyster sauce; 1/2 tbsp chicken bouillon powder; 1 tbsp white vinegar; 1 tsp sugar; 1 tbsp Korean chili pepper flakes (gochugaru); 1 tbsp toasted sesame oil