In a large pot, bring generously salted water to a boil. Add the fettuccine or spaghetti and cook according to the package instructions until al dente, typically around 8-10 minutes. Before draining, reserve about 1/2 cup of the pasta water. Drain the pasta and set it aside.
Season the thinly sliced flank steak with a sprinkle of salt, freshly ground black pepper, and red pepper flakes for heat. In a large skillet, heat 1 tablespoon of olive oil over medium-high heat. Once hot, add the seasoned steak slices in a single layer. Sear for about 2-3 minutes per side or until browned and cooked to your desired level of doneness. Remove the steak from the skillet and allow it to rest on a plate.
In the same skillet, add the remaining tablespoon of olive oil. Add the minced garlic and sauté for about 30 seconds until fragrant. Next, toss in the sliced red bell pepper and julienned zucchini. Sauté for approximately 4-5 minutes, stirring occasionally, until the vegetables are tender yet retain their vibrant color.
In a small bowl, whisk together the honey, soy sauce, rice vinegar, and additional red pepper flakes for more heat if desired. Pour this flavorful sauce over the sautéed vegetables in the skillet, stirring to ensure they are well-coated and heated through.
Slice the rested steak into bite-sized pieces. Add the drained pasta along with the steak to the skillet containing the sautéed vegetables and sauce. Gently toss everything together, adding reserved pasta water gradually as needed to loosen the sauce and enhance the mixing of flavors.
Taste the pasta dish and adjust the seasoning if necessary, adding extra salt or pepper to suit your liking. Serve the pasta hot, beautifully garnished with fresh basil leaves and a sprinkle of grated Parmesan cheese, if desired.
Notes
Adjust the red pepper flakes based on your heat preference.