Red Lentil Soup with Lemon-Mint Yogurt
You can use vegetable broth instead of chicken if you want this animal free, or if business is slow, you can even use water. If you use a plant-based yogurt and olive oil instead of butter, you could make this fully vegan.
Other varieties of lentils will work.
If making well ahead, blanching the mint for a few seconds in boiling water and then shocking in ice water will help retain the green color once mixed into the yogurt.
If you're not into the yogurt, some crumbled feta cheese is also nice with this.