Roasted Cauliflower+Chickpeas with Mustard+Parsley

can chickpeas, rinsed and drained and dried in a kitchen towel

head of cauliflower, outer leaves removed, cut into bite-sized florets

Extra virgin olive oil

Coarse sea salt

Dijon mustard

seeded mustard

white wine vinegar

Freshly ground black pepper

chopped Italian parsley