Buttermilk Bagna Cauda

Ingredients

• 3 garlic cloves, peeled and halved lengthwise
• 2 sprigs thyme
• 3 tablespoons unsalted butter
• 4 anchovy fillets
• 1/4 cup olive oil
• 1 pinch salt, more if needed
• 2 tablespoons buttermilk
• Fresh and lightly blanched vegetables, like asparagus, green beans, cauliflower, Romanesco broccoli, small carrots, etc., at room temperature