Mix all your meatloaf ingredients together in bowl and place in baking pan and top lengthwise with and cook for about 1 hour.
Meanwhile, slice your onions very thin* and add your buttermilk to a bowl.
Place your onions in buttermilk and set aside.
Once meatloaf is done remove from oven and let cool until able to be handled.
In sauce pan add your BBQ sauce ingreidients, bring to boil, once boiling reduce heat to simmer and continute to cook for about 10 minutes.
Preheat your deepfryer to 375.
In bowl add your flour, seasoning salt, paprika, cayenne pepper, salt and pepper.
In 2 batches take half of your onions and dip it in your flour mixture then place in deep fryer for a few minutes until golden, repeat and set aside on paper towel lined plate to cool.
In skillet add about 1/2-1 cup bbq sauce and place meatloaf on top and heat on medium-high meat and grill your meatloaf slices in batches until bbq sauce starts to coat outside of meatloaf and thickens.
Top with cheese slices until melted, place on buns, top with onion straws and serve!
We like to use our mandolin to slice our onions to our desired thinness.