Sous Vide Meatballs

Combine the ground beef, pork, egg, onion, Parmesan cheese, oats, milk, salt, garlic powder, and pepper. Mix until well blended. If you use a stand mixer with paddle attachment, take care not to overmix. 

Line a large rimmed baking sheet with parchment paper.

Shape the meat mixture into about 30 to 36 meatballs equal in size. For very uniform meatballs use a small cookie scoop or weigh them. 

Arrange the meatballs on the baking sheet and transfer to the freezer. Freeze for about 1 to 2 hours, until very firm.

Vacuum seal the frozen meatballs in individual bags or seal in zip-close food storage bags, removing as much air as possible. Return to the freezer. 

Set the sous vide cooker temperature to 144 F (62.2 C).

When the cooker gets to 144 F (62.2 C), put the bag(s) of frozen meatballs in the water. If you didn't have a vacuum sealer, make sure the meatballs are well immersed in the water. You can use a clip to attach the top of the bag to the pan. 

Set the timer to 2 hours.

When the meatballs are cooked, take them out of the bags, gently pat them dry, and sear them for a minute or two in hot olive oil to brown the outside. Add them to a pasta sauce or toss them with some sweet and sour sauce or marinara and serve them with rice or pasta.

If you aren't eating them right away, drop the bags in a container with half ice and half water to cool the meatballs quickly to 40 F (4.44 C) and store in the refrigerator for a few days or in the freezer for up to one year.