Boil 1 lb dried spaghetti until al dente. Reserve 1 c pasta water. Drizzle noodles in olive oil to prevent sticking
Add 4 tbsp unsalted butter, 2 tbsp olive oil, `2 tbsp garlic, 1 lb shrimp to pan. Season with ½ tsp salt and ¼ tsp black pepper (or to taste) Cook for 1-2 mins on each side on medium heat. [see notes] Set aside.
In the same pan add 2 tsp sesame oil, 3 tbsp gochujang, 2 tsp gochugaru, ⅛ c coconut aminos, 2 tsp honey, ⅛ c mirin, ⅛ c lemon juice. Stir to combine. Add noodles and splashes of pasta water until noodles are glossy and well coated. Add shrimp.
Portion into a bowl and add parmesan [2], scallions, toasted sesame seeds, and crushed chili flakes if you like a little extra heat.