1. Cook pasta according to package directions, omitting salt and fat. Drain, reserving 1/4 cup pasta water; keep warm.
2. Remove green tops from green onions; thinly slice, and set aside. Mince white portions of green onions; set aside.
3. Heat oil in a large nonstick skillet over medium-high heat. Add minced green onions, bell pepper, pork, and mushrooms; sauté 3 minutes or until pork is browned. Combine reserved 1/4 cup pasta water, teriyaki sauce, and chili garlic sauce in a small bowl, stirring with a whisk. Add pasta and teriyaki sauce mixture to pan; toss well to coat. Stir in sliced green onion tops.
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