Green Beans Indian-Style

Heat oil in a large nonstick skillet over medium-high heat. Add mustard seeds and saute for 30 seconds, or until they start to pop. Stir in beans, carrots and onions and cook, stirring constantly, for 5 minutes. Stir in salt, coriander and ginger. Reduce heat to low, cover and cook, stirring often, for 8 to 10 minutes, or until the beans are tender-crisp. Stir in lemon juice and serve.