White Bean and Lamb Soup

Ingredients

• ½ lb dried great Northern beans (, sorted and washed)
• 1 medium onion (, chopped)
• 3 tbsp olive oil
• 3 cloves garlic (, chopped)
• 1 ¼ lb ground lamb
• 3 medium carrots (, peeled and diced)
• 3 stalks celery (, diced)
• 1 ½ cups canned roma tomatoes (, including liquid)
• ¼ cup chopped fresh parsley
• 1 tsp dried thyme
• ½ tsp dried oregano
• Freshly ground black pepper (, to taste)
• Salt (, to taste)
• 6 cups chicken broth
• ½ lb baby spinach leaves
• 4 oz crumbled feta cheese