With various swaps, you can make this Whole 30, paleo, and low carb. To make this dairy free to comply with Whole 30 and Paleo, use good quality plant-based yogurt and dilute heavily with water to create a yogurt soup base. To make Okroshka low-carb, simply omit the potatoes. Because of the substantial animal products, it would be hard making a vegetarian version of Okroshka without sacrificing flavor, texture, and substance.