Cook the pasta according to package directions until al dente. Drain and set aside.
In a large skillet, heat olive oil over medium heat. Add the sliced chicken sausage and cook until golden brown on both sides.
Add minced garlic to the pan and stir for 30 seconds until fragrant.
Whisk together honey, soy sauce, and rice vinegar in a small bowl, then pour into the skillet.
Bring the mixture to a simmer and cook for 3–4 minutes, letting it thicken slightly.
Stir in the cornstarch slurry and cook until the sauce becomes glossy and coats the sausage evenly.
Add the cooked pasta to the skillet and toss to coat in the sauce.
Season with salt, pepper, and red pepper flakes if desired.
Garnish with chopped parsley and serve warm.