In 12-inch nonstick skillet, heat 1 tablespoon of the oil over medium-high heat. Cook chicken, 1/2 teaspoon of the salt, the chili powder, cinnamon, cumin and pepper in oil 6 to 8 minutes, stirring occasionally, until chicken is no longer pink in center. Remove with slotted spoon to bowl. Reduce heat to medium. Cook onion in remaining 1 tablespoon oil 3 minutes, stirring occasionally, until tender. Add garlic; cook and stir 1 minute.