Cosy Cabbage and Farro Soup

Ingredients

• 1 pound cabbage, savoy or green
• Olive oil
• 1 medium onion, thinly sliced
• Kosher salt and freshly ground black pepper
• 3 garlic cloves, smashed and peeled
• 1 sprig of rosemary or thyme (optional because I’ve forgotten it each time, and not regretted it)
• 1 tablespoon red wine or white wine vinegar
• 2/3 cup uncooked farro
• About 4 cups homemade or store bought chicken or vegetable broth
• 1 tablespoon fresh lemon juice
• Shaved parmesan, to finish