01 - Fill a small pot with water and bring to a rolling boil. Add instant ramen noodles and cook according to the package directions until just tender, approximately 2–3 minutes. Drain and reserve 2 tablespoons of cooking water.
02 - While noodles are cooking, melt unsalted butter in a nonstick skillet over medium heat. Add minced garlic and sauté for 1 minute, stirring constantly, until fragrant but not browned.
03 - In a mixing bowl, combine egg, shredded cheese, soy sauce, sriracha, and reserved noodle cooking water. Whisk thoroughly until the mixture is smooth.
04 - Add drained noodles to the skillet containing sautéed garlic. Reduce heat to low.
05 - Pour the prepared egg and cheese mixture over the noodles. Stir continuously using tongs or chopsticks for 1–2 minutes until the sauce thickens and fully coats the noodles. Take care not to overcook to prevent scrambling the egg.
06 - Transfer noodles to a serving bowl. Top with sliced green onion, toasted sesame seeds if desired, and freshly ground black pepper. Serve immediately while hot.