Cook bacon in a large skillet or on a griddle over medium heat until browned and crisp. Drain on paper towels. Crumble into 1/2” pieces; set aside.
Cut florets from broccoli stems and chop into small pieces. Transfer to a salad bowl and toss with minced onion and raisins.
In a small bowl, whisk together mayonnaise and vinegar until smooth. Add honey, salt and pepper, whisking to combine. Pour dressing over broccoli mixture and toss to coat evenly. Crumble bacon pieces over broccoli slaw and serve immediately.