Preheat oven to 350ºF. Ideally I like to use a small broiler pan so the grease drains away. Line the bottom pan with foil for easy clean up.If you don't have a broiler pan, you can also use a loaf pan. Spray pan with cooking spray and set aside.
For the glaze whisk together chili sauce, apple juice, 2 tablespoons apple butter, vinegar, and dry mustard. Remove 1/3 cup and set both bowls of glazes aside.
In a large bowl lightly whisk egg and then add 1/4 cup apple butter, shredded apple, beef bouillon, minced onion, garlic, salt, pepper, and oats. Mix well. Add ground pork and mix with wooden spoon or hands until well incorporated. Shape into loaf and place on broiler pan, or in loaf pan. Pour the larger amount of glaze over the loaf (keeping the 1/3 cup still set aside).
Bake for 45 minutes. Remove from oven, brush over remaining 1/3 cup of glaze. Return to oven and increase temperature to 400ºF. Bake for 20 minutes more, or until internal temperature reaches 160ºF. Let sit for 5-10 minutes, and then slice for serving.
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