In a medium bowl, combine the breadcrumbs and heavy cream. Mix well until the breadcrumbs fully absorb the cream and become soft and creamy.
Add the paprika, Italian seasoning, egg, and minced garlic. Mix well and set aside while preparing the remaining ingredients.
Place the rice into a sieve and boil it for 3 minutes. Rinse under cold water and drain well.
Meanwhile, heat the olive oil in a skillet over medium heat. Add the chopped onion and cook until soft and lightly golden. Season with a small pinch of salt and black pepper.
In a large bowl, combine the ground pork and beef with the salt and black pepper. Add the cooked onion, partially cooked rice and breadcrumb mixture.
Mix everything very well for about 5 minutes until smooth and fully combined.
Lightly wet your hands with water and shape the mixture into large meatballs. Place them into a baking dish in a single layer.
To prepare the sauce, melt the butter together with the olive oil in a large skillet over medium heat. Add the flour and stir until smooth.
Pour in the crushed tomatoes and water. Add the salt, sugar, and Italian seasoning. Simmer for about 5 minutes while stirring occasionally.
Pour the tomato sauce evenly over the meatballs.
Bake uncovered at 400°F for 40 minutes using bottom heat until the meatballs are tender and fully cooked.
Sprinkle with fresh parsley before serving.