Dice the red bell pepper, green bell pepper, jalapeno, and green onions, and place them in a large bowl. Add the remaining ingredients to the bowl and mix well.
½ cup diced red bell pepper, ½ cup diced green bell pepper, 1 jalapeno, 3 green onions, 15 ounce can black beans, 1 cup corn, 3 tablespoons cilantro, 3 to 4 tablespoons fresh lime juice, 1 garlic clove, ½ teaspoon kosher salt, 1 teaspoon ground cumin