To a small mixing bowl, add hummus, spicy mustard, lemon zest + juice, minced capers + brining juice, minced garlic, salt + pepper, and whisk thoroughly to combine. Olive oil is optional, but will add a bit more creaminess.
Add a little hot water to thin until pourable and whisk until creamy and smooth (see photo). Taste and adjust flavor as needed, adding more salt and pepper, lemon juice, or minced garlic if desired! Maple syrup will help offset how salty and briney this dressing is, if you find you need it (I did not).
Use immediately, or store in the refrigerator up to 5-7 days.
*We also have a Vegan Caesar Dressing recipe here that's made with cashews! *Nutrition information is a rough estimate. *Recipe makes ~1/2 cup dressing.