Boil rotini according to package directions. Drain and set aside.
Heat olive oil in a skillet. Season steak with salt and pepper. Cook 2–3 minutes per side until desired doneness. Remove and set aside.
Reduce heat to medium. Sauté garlic for 1 minute, then add honey, soy sauce, vinegar, and ginger. Simmer for 2–3 minutes.
Stir in the cornstarch mixture and cook for 1–2 minutes until sauce thickens and becomes sticky.
Add steak back to skillet and coat with sauce. Toss in cooked rotini until evenly coated.
Sprinkle with chopped parsley and sesame seeds before serving hot.