01 -
Preheat oven to 375°F (190°C).
02 -
In a large bowl, combine ground beef, spinach, garlic, breadcrumbs, egg, parmesan, salt, and pepper. Mix gently.
03 -
Take a portion of the meat mixture, flatten it, place a mozzarella cube in the center, and shape into a ball. Repeat for all meatballs.
04 -
Heat olive oil in a skillet and sear the meatballs on all sides for 5-6 minutes.
05 -
Transfer meatballs to a baking dish and bake for 10-12 minutes until cooked through.
06 -
Serve with marinara sauce and garnish with parmesan or fresh basil.