Mini Burgers (Sliders)

Ingredients: makes 10 500g Minced/Ground Beef 2 Onions 1 cup BBQ sauce (see link for recipe) 10 spinach leaves 3 slices cheddar cheese (cut into qtrs) 2 tsp garlic powder 1 egg 2 tsp dried oregano 1/4 cup cornflake crumbs salt & pepper to season 10 mini Panini Rolls