Mix all ingredients in a microwave safe bowl and heat on high for 2 minutes.
Or if you don't like the microwave, mix in a small sauce pan over medium heat until the mixture is heated.
This is a quick and easy side dish for Mexican meals. Also a good source of protein. You can make it for 1 or 10, just use equal parts of corn and black beans and 1/4 of that amount in salsa.