Bring a pot of water to boil. Cook noodles as per packet instructions. Once noodles are al-dente drain noodles.
While water is boiling stir ingredients for sauce in a bowl. Add sriracha sauce, low sodium soy sauce, oyster sauce, brown sugar, red chili flakes (optional), ground pepper and salt (if needed). Mix well together and keep aside.
In a large wok or skillet melt butter. Add olive oil to the pan.
When hot, add minced garlic and saute on low flame for about 2 minutes.
Add scallions and saute. Let garlic and scallions infuse in butter for about 3 to 4 minutes on low flame. Do not brown scallions and garlic.
Add prepared sauce into the sauce. Mix well.
Let it cook for 1 minute.
Turn heat to low and add cooked noodles to the pan. Toss or mix to coat noodles in sauce well.
Add grated Parmesan cheese (optional). Mix well.
Turn off flame.
Garnish with green onions and sesame seeds.
Serve immediately hot.