In small nonstick pot, combine broth, soy sauce, peanut butter, and sesame oil. Whisk until blended. Bring to boil, reduce heat, and cook 5 minutes; set aside.
In large nonstick skillet coated with nonstick cooking spray, sauté green pepper, garlic and ginger over medium heat 3 minutes. Add shrimp, cook several minutes. Add reserved soy broth sauce to shrimp, continue cooking until shrimp are done, 3 to 5 minutes.
Cook pasta according to package directions. Drain; toss with shrimp mixture. Sprinkle with peanuts and green onions.