Preheat oven to 400 degrees F and line two baking sheets with foil.
In a medium bowl, toss sweetpotato chunks with 1 tbsp olive oil and 1 tbsp zaatar. Transfer to one prepared baking sheet and bake until cooked through, about 20-25 minutes.
In a separate medium bowl, toss tofu chunks with 1 tbsp olive oil and 1 tbsp zaatar. Transfer to second baking sheet and bake until lightly browned, about 20 minutes.
Cool both to room temperature.
In a large bowl, add cooled sweetpotatoes, tofu, beans, bell peppers, cucumbers, red onion, and olives.
To make the dressing, in a blender, add olive oil, labneh, white vinegar, lemon juice, and garlic. Blend until smooth, about 1-2 minutes. Drizzle over salad and toss until well-combined.
Optional step: Transfer one serving to single serve containers. Store in the refrigerator for 3-5 days.