Meanwhile, heat the skillet with sausage drippings over medium heat. Add garlic and cook until it is golden brown, about 5 minutes. Add broccoli, red pepper flakes, and salt; increase heat to medium-high and cook, continually stirring, until broccoli is hot and completely tender, about 5 minutes. Add the sausage to the pan, mix well and cook until sausage is warmed, about 5 more minutes.