Preheat oven to 450° F. Brush a 12 muffin tin with vegetable oil
Put ground beef into a big bowl
Put onions into a food processor
Add the pickles to the food processor
Pulse the food processor to finely chop the onion and pickles. Add to the meat bowl
Whisk the milk into the beaten egg and add to the meat. Add bread crumbs and grill seasoning
In a small bowl, mix together the BBQ sauce, salsa and Worcestershire sauce
Pour half the sauce mix into the bowl with the meatloaf mix. Mix the meatloaf together with your hands
Use a large ice cream scoop to put the meat into the muffin tin
Top each "muffin" with a spoonful of reserved sauce. Bake about 20 minutes. Cut open a muffin to test if it's cooked through