Brown the ground lamb. Warm a skillet over medium heat and add in the ground lamb. Use a spatula to break apart the ground lamb while cooking for 5-7 minutes to a beautiful golden brown.
Add in the spices. When the lamb is mostly cooked, add in the garam masala, salt, and pepper. Stir well and continue cooking until no pink remains.
Toast the buns. Remove the cooked lamb from the skillet and add in the olive oil. Once warm, place the slider buns into the skillet and allow the inside portions to toast.
Assemble the sliders. Remove the brioche slider buns from the skillet and place them on a plate. Top with a generous portion of the seasoned lamb mixture. Top with sliced red onion and fresh cilantro, serve, and enjoy!