Preheat the oven to 375°F. Line a baking sheet with parchment paper. (See post for pan-frying instructions.)
Use a potato masher or fork to mash the black beans in a large bowl until they're mostly mashed (still with some chunks).
Add the remaining ingredients to the bowl and mix well.
Use a cookie scoop (I used a size 40) or tablespoon measure to shape the mixture into 20 balls, around 2 tablespoons in size. Arrange on the prepared baking sheet.
Bake for 30 minutes (until internal temperature reaches 195°F).
Serve with pasta and marinara or in your meatball-focused recipe of choice!