In a large pot of salted boiling water, cook the rotini according to package instructions until al dente. Drain and set aside.
In a bowl, whisk together honey, minced garlic, soy sauce, sesame oil, and grated ginger.
Place the sliced flank steak in a resealable bag or a shallow dish. Pour the marinade over the steak, making sure it's well-coated. Let it marinate for at least 30 minutes (or up to 2 hours in the fridge).
In a large skillet, heat 2 tablespoons of olive oil over medium-high heat. Add the sliced bell pepper and broccoli florets. Sauté for about 3-4 minutes until they start to soften. Remove from the skillet and set aside.
In the same skillet, add the marinated steak along with the remaining marinade. Cook for about 4-6 minutes or until the steak is cooked to your desired level of doneness. Stir it continuously for even cooking.
Add the sautéed vegetables to the skillet with the steak. Toss in the cooked rotini and mix everything together, ensuring the pasta is fully coated with the honey garlic sauce. Season with salt and pepper to taste.
Divide the Honey Garlic Steak Rotini among plates or bowls. Garnish with chopped green onions and sesame seeds.
Notes
For best flavor, marinate the steak for up to 2 hours.