Combine the ground beef, long grain rice, egg, dehydrated onion flakes, garlic powder, Italian seasoning, salt, and black pepper in a large mixing bowl. Mix until everything is well combined.
Roll the meat mixture into meatballs, about the size of ping pong balls. Place the meatballs on a plate or baking sheet lined with parchment paper as you go.
Add the crushed tomatoes to the insert of the slow cooker along with ½ cup of water and the remaining teaspoon of Italian seasoning, then nestle your meatballs gently into the sauce.
Cover the slow cooker with the lid and cook on low for 4-5 hours or on high for 3-4 hours, or until the meatballs are cooked through and the rice is tender.
Scoop the cooked meatballs out of the sauce. Stir in the balsamic vinegar and torn basil. Adjust the seasoning with salt and pepper to taste.
Serve the meatballs hot with sauce and garnished with additional fresh basil if desired. Enjoy!
Notes
Chef Jenn's Tips:
Use lean ground beef for meatballs that are juicy but not greasy.
Don't substitute instant rice for long grain rice, as the cooking times and textures are different.
Feel free to customize the seasoning to suit your taste. Add a pinch of red pepper flakes for heat or swap out the Italian seasoning for your favorite herb blend.
Nutritional information for this recipe is provided as a courtesy and is calculated based on available online ingredient information. It is only an approximate value. The accuracy of the nutritional information for any recipe on this site cannot be guaranteed.