Preheat oven to 275 degrees. Set a wire cooling rack on a baking sheet and spray with cooking spray.
Break bread into small pieces. Place in a mixing bowl. Pour milk over bread and mash with a fork until it forms a paste. Stir in salt, pepper, garlic, and ketchup. Add ground sirloin and stir, just to combine.
Spray a hand shaped cookie cutter with non-stick cooking spray.
Press 1/6th of the mixture into the cookie cutter, being careful to press the meat into the finger area.
Remove the cutter and use a spatula to transfer the Hand-Burger to the prepared rack.
Repeat for remaining burgers.
Bake for 12 minutes.
Spray an indoor grill pan (or skillet) with non-stick cooking spray.
Heat over high heat. Remove Hand-Burgers from oven and place them onto grill pan.
Brown burgers on both sides.
Cook to medium (140-145 degrees) or medium well (150-155 degrees).
Serve on dinner rolls or slider buns with ketchup.