Preheat the oven to 400 degrees F. Line a large baking sheet with aluminum foil. Arrange the bacon slices on the baking sheet.
Place into the oven and bake until the bacon is crisp (about 8 to 10 minutes). Drain on paper towels. Chop the bacon and set aside.
In a large bowl combine ground chuck, Worcestershire sauce, onion soup mix, bread crumbs, black pepper, beef stock, and chopped bacon. Mix well.
Form portions of the meat mixture around bocconcini to make smooth balls.
Arrange the meatballs onto a lightly greased baking sheet. Place into the oven and bake at 400 degrees F. until the meatballs are fully cooked (the internal temperature has reached 160 degrees F.).
To make the marinara sauce.
Add oil to a medium saucepan over medium-high heat. Add onion, garlic, basil, oregano, and pepper.
Sauce for a few minutes. Stir in the crushed and diced tomatoes, red pepper flakes, and chicken bouillon. Reduce the heat and simmer for 10 to 15 minutes. Remove the meatballs to a serving platter and serve with marinara sauce.