1. Combine: Put the little smokies in the slow cooker and add the BBQ sauce, grape jelly, garlic powder, and red pepper flakes (if using).
2. Cook: Slow cook the smokies on low for 2 to 3 hours or until they are hot and the sauce is thickened.
3. Serve: Set the slow cooker on warm for serving, or transfer the vegetables to a platter to serve them all at once. If desired, garnish with thyme leaves, parsley, or chives.