Preheat the oven to 375 degrees F and line a baking sheet with parchment paper.
Cook the bacon in a skillet until crisp, then crumble it and set aside.
In a large bowl, combine the ground pork, crumbled bacon, diced apple, breadcrumbs, egg, chopped onion, salt, black pepper, and thyme. Mix until evenly blended.
Divide the mixture into four equal portions. Flatten each portion slightly, place one Gouda cube in the center, and shape the meat around it to form a mini loaf, sealing the cheese inside.
Place the meatloaves on the prepared baking sheet and bake for 25 to 30 minutes until the internal temperature reaches 160 degrees F.
Let the meatloaves rest for 5 minutes before serving.