Whole Roasted Cauliflower with Anchoiade

Ingredients

• 1 head cauliflower, outside leaves removed
• Extra virgin olive oil
• Kosher salt
• 5 whole salt-packed anchovies, or 10 oil-packed anchovy fillets
• 1/3 cup blanched whole almonds, toasted
• 2 garlic cloves, coarsely chopped
• 2 tablespoons unsalted butter, room temperature
• 1/2 cup extra-virgin olive oil
• 1 1/2 teaspoons aged red-wine vinegar
• 2 tablespoons fresh finely chopped flat leaf parsley
• 1 teaspoon crushed red pepper flakes