Drain and rinse the canned beans. Set aside for now.
Heat the oil in a pot over medium high heat and add mustard seeds. Once they begin to pop, add the onions, reduce the heat to medium, and cook for 2 minutes, or until softened.
Add the corn and cook for 2 to 3 minutes, or until thawed. Then add the beans and spices and mix well.
Turn off the heat and add the cilantro, lemon juice and mango.
Serving: 1servingCalories: 218kcalCarbohydrates: 42gProtein: 8gFat: 4gSaturated Fat: 1gSodium: 528mgPotassium: 60mgFiber: 8gSugar: 17gVitamin A: 3186IUVitamin C: 14mgCalcium: 93mgIron: 4mg