Heat oil in a large nonstick skillet coated with cooking spray over medium-high heat. Add onion and bell pepper; sauté 8 minutes or until tender. Add sweet potato and garlic; sauté 1 to 2 minutes. Add tomato paste and next 7 ingredients; stir well. Bring to a boil; add rice. Reduce heat; simmer, uncovered, 20 minutes or until rice is tender, stirring occasionally. Remove bay leaves.
Add green onions and beans; stir gently. Cook over medium heat until thoroughly heated. Serve immediately.