Cook pasta according to package; drain. Meanwhile, pour one tablespoon of the oil into a large nonstick skillet. Preheat over medium-high heat. Stir-fry meat in hot oil for 3 to 4 minutes or until slightly pink in center. Remove from skillet.
Add the remaining 1 tablespoon oil to skillet. Add green beans; stir-fry for 3 minutes. Add sweet pepper and green onions; stir-fry about 2 minutes more or until vegetables are crisp-tender. Add coconut milk, curry paste, and sugar. Reduce heat to low, stirring until combined. Stir in cooked meat and lime juice; heat through. Serve immediately over pasta.