Preheat the oven to 375 degrees F
In a heavy-bottomed skillet, heat the olive oil over medium-high heat.
Add the onion and the bell pepper, season with ½ teaspoon sea salt, and sauté until the onions are translucent.
Add the garlic and sauté until fragrant.
Remove from the heat and allow to cool.
In a large mixing bowl, combine the ground beef, ½ teaspoon sea salt, ground black pepper, fresh parsley, and the cooled mixture of sauteed onions, bell peppers, and garlic.
With your hand, mix all of the ingredients together until a homogenous mixture forms.
Using your hands again, form the mixture into meatballs. Aim for 1.5 inches in diameter.
Add the meatballs to a 9 X 13 inch baking dish.
Pour the sauce over the meatballs and mix gently to coat the meatballs in sauce.
Do your best to arrange the meatballs in a single layer.
Bake for 25 minutes.