White Bean Soup with Lemon and Orzo

Name: White Bean Soup with Lemon and Orzo
Prep time: 5 min
Cook time: 20 min
Total time: 25 min
Cuisine: American, Italian
Ingredients: 1 tbsp olive oil; 1 yellow onion (diced); 2 carrots (diced); 4 cloves garlic (minced); 1 stalk celery (diced); 1 tsp dried oregano; 7 cups vegetable broth; 1 can white beans (drained and rinsed); 2 lemons (juiced); 1 tsp lemon zest; 1/4 cup fresh dill (chopped); 1 cup orzo; 1 handful kale (chopped or torn); 1/4 cup cashew butter (or tahini)