Crumble the blue cheese with your fingers into small bits. Add to a bowl. Mince the garlic and stir in the rest of the ingredients. Alternatively, use a screw-top jar and shake to combine. Taste and adjust seasoning.
Refrigerate until ready to use. Can be kept refrigerated for up to 3 days.
I used homemade yogurt which is usually more runny than store-bought. I like this consistency, but if you'd prefer your dressing thicker, use store-bought yogurt or hang in muslin to get the desired thickness.