Heat the oven to 425°F. Combine all ingredients except for the olive oil together in a large bowl and stir to combine. Shape the mixture into 16-18 meatballs. Line a rimmed sheet pan with parchment paper and set aside.
Heat the olive oil in a large skillet over medium heat and when it's hot, sear the meatballs for about 2 minutes per side. You may need to do this in batches, depending on the size of your pan.
Transfer the seared meatballs to the sheet pan and bake for an additional 5 to 7 minutes. Serve warm.