01 - Bring a large pot of salted water to a rolling boil. Add pasta and cook until al dente, according to package directions. Drain thoroughly and set aside, reserving ¼ cup pasta water if desired.
02 - Heat olive oil in a large skillet over medium-high heat. Add sliced sausage in a single layer and cook for 3-4 minutes, turning once, until evenly browned and caramelized on both sides.
03 - Add sliced onion to the skillet with the sausage. Reduce heat to medium and sauté for 3 minutes until softened and translucent. Stir in minced garlic and cook for 1 minute until fragrant, being careful not to burn.
04 - Pour in chicken broth, soy sauce, honey, and tomato paste. Stir thoroughly to dissolve tomato paste and combine ingredients. Scrape up any browned bits from the bottom of the skillet. Bring mixture to a gentle simmer.
05 - Add cooked pasta to the skillet. Toss vigorously with tongs to coat evenly in the sauce. Let simmer for 4-5 minutes, stirring frequently, until sauce reduces and thickens, clinging nicely to the pasta.
06 - Remove from heat. Season with chili flakes and black pepper to taste. Transfer to serving plates or a communal platter. Sprinkle generously with fresh chopped parsley and serve immediately while hot.