Make the dough

• Warm the milk and stir in the yeast and sugar, then let it sit until foamy.
• Add the bread flour, salt, garlic powder and eggs and mix into a dough.
• Knead in the softened butter until smooth and elastic.

Let the dough rise

• Cover the bowl and let the dough rise until doubled in size.

Cook the beef

• Brown the ground beef in a pan, breaking it up as it cooks.
• Season with the burger seasoning, smoked paprika, Worcestershire sauce, salt and pepper.

Caramelize the onions

• Melt the butter with the olive oil in a pan.
• Add the diced onion and a pinch of salt and cook until soft and golden.

Mix the burger sauce

• Combine the mayo, ketchup, yellow mustard, Worcestershire sauce, relish, salt and pepper.

Shape and fill the bombs

• Divide the dough into 8 equal pieces and roll each into a 5-6 inch circle.
• Fill each circle with burger sauce, grilled onions, ground beef and mozzarella cheese.
• Pinch the edges together to seal into a ball and place on a baking tray.

Bake

• Brush the tops with egg wash made from the egg and water.
• Bake at 375F until golden brown.

Brush with garlic butter

• Melt the butter with the minced garlic.
• Brush the warm garlic butter over the baked bombs and sprinkle with parsley and parmesan.