If using canned black beans, drain and rinse them before using them. To do this, I pour them into a colander and rinse under warm water.
Next, place the frozen corn in the colander and run the kernels under warm water to defrost. There is no need to cook it.
Dice the purple onion and chop up the cilantro.
For the lime, I recommend using a citrus zester to zest it before squeezing out the juice for this recipe. When it’s whole, it is much more firm and easy to zest.
Combine all ingredients in a large bowl and mix well. The recipe calls for 3 tablespoons of balsamic vinegar, but I love balsamic and actually use a little more.
Stir together thoroughly and serve. It tastes even better after a few hours (or next day) after marinating in the refrigerator.
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Notes
Tips & Substitutions:
Rinse the beans- If using beans from a can, drain and rinse them well. Black bean juice can make this dish less appealing visually.
Fire-roasted tomatoes- The ingredient list for this recipe calls for either fresh diced tomatoes or fire-roasted tomatoes. I love to use fire-roasted tomatoes because they add such a terrific flavor, and they are not spicy at all. Don't drain them; use the juice too.
Vinegar- I use balsamic but other vinegars will work well too.
Make ahead- Allowing this recipe to marinate in the refrigerator for a few hours before serving really enhances the flavor.
Storage- Store in an airtight container in the refrigerator for 5-7 days.