Cook the bacon - Cook the oven in a 400 degree oven for 15-18 minutes, until crispy. Lay out on a paper-towel lined plate.
Prep the veg and shred the cheese - Trim the dry ends and any leaves from the broccoli. Thinly slice the stems and chop into ½-inch pieces. Break the flowerets into very small pieces. Peel and mince the onion.
Make the dressing - Mix the vinegar, sugar, and mayo. Stir until the sugar has dissolved and the dressing is very, very smooth. Crumble the bacon and salad blend.
Combine - Add the broccoli, bacon, onion, garbanzo beans, and cheeses to a medium bowl. Stir in the dressing, 1 tablespoon at a time, until the salad is evenly coated but not goopy.