Add the ground lamb to a bowl and add in the garlic, onions, salt, pepper, mustard and paprika. Stir to mix, but only until just combined, then form sliders (I like mine about 2 inches in diameter) of equal size. Cook the sliders either on the grill or in a skillet over medium-high heat until they are cooked to your desired doneness – I like about 2 to 3 minutes per side.