1. Combine curry powder, coriander, turmeric, salt, black pepper, red pepper, and bay leaf in a small bowl.
2. Heat oil in a large Dutch oven over medium-high heat. Add chicken to pan; sauté 5 minutes or until browned, stirring occasionally. Remove chicken from pan. Reduce heat to medium. Add onion to pan; cook 10 minutes or until tender, stirring frequently. Increase heat to medium-high; return chicken to pan. Cook 1 minute, stirring occasionally. Stir in ginger and garlic; cook 1 minute, stirring constantly. Add curry powder mixture; cook 2 minutes, stirring constantly. Add broth and tomatoes; bring to a boil. Cover, reduce heat, and simmer 1 hour. Stir in potato and chickpeas. Cook, uncovered, 30 minutes. Add peas; cook 5 minutes or until thoroughly heated. Remove from heat; stir in lemon juice. Discard bay leaf.