Bacon Wrapped Stuffed Onion Bombs! Check the comments for full recipe

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ingredients:
4 medium-sized yellow onions, you will use the outer 2 layers of each onion
2 pounds lean ground beef, 93%-7% blend
½ cup bread crumbs
1 large egg
¼ cup whole milk
⅓ cup bottled barbecue sauce
3 tablespoons bottled barbecue sauce, for the meat mixture
1 teaspoon garlic powder
1 teaspoon onion powder
1 teaspoon salt
¼ teaspoon black pepper
8 cheddar cheese cubes, 1-inch sized
16 pieces center-cut smoked bacon