Combine the ground beef, onion, bell pepper, garlic, onion powder, bacon, brown sugar, baked beans, BBQ sauce, and Dijon mustard in a large freezer bag. Squeeze the ingredients together to combine.
Remove excess air from the bag, seal, and freeze.
Thaw.
Preheat the oven to 350°. Transfer the ingredients to a baking dish and bake for one hour.
Thaw.
Pour the ingredients from the freezer bag into your slow cooker and cook on high for two to four hours and low for three to five hours.