kosher salt and freshly ground black pepper, to taste
1 garlic clove, minced
4 cups diced root vegetables (see notes*)
½ cup pearl barley, rinsed and drained
4 cups vegetable broth
2 tablespoons whole-milk plain yogurt
2 tablespoons chopped fresh dill, plus more for garnish
1 tablespoon finely grated lemon zest
freshly squeezed lemon juice (for finish, optional)
Instructions
In a large pot, heat butter and olive oil over medium heat. Add onion and season with salt and pepper. Cook, stirring occasionally, until onions have softened, about 8 minutes. Add garlic and cook until fragrant, about 1 minute.
Add root vegetables and cook, stirring occasionally, until they start to brown, about 5 minutes.
Add barley and vegetable broth; stir and bring to a boil. Reduce heat to low and simmer, stirring occasionally, until vegetables are tender, about 25 minutes.