Place a large skillet over medium heat and once heated, add in bacon. Let bacon cook until crispy about 5-7 minutes per side. Once cooked, transfer to a plate with slotted spoon and leave a little more than half of the bacon grease in the pan. Immediately add in the garlic and kale and season with salt and pepper. Cook, tossing occasionally, for 5 minutes or until wilted and cooked.