Creamy Cauliflower Rice Soup

Ingredients

• 8 cups low-sodium chicken stock
• 1 1/2 lbs 24 ounces cauliflower florets (cut into bite-sized pieces)
• 1/2 small lemon
• sage (rosemary and thyme sprigs tied together)
• 3 tablespoons unsalted butter (divided)
• 5 cloves of garlic (crushed)
• 1/4 cup finely diced celery
• 1/2 cup finely chopped carrots
• 2 tbsp flour
• 1/3 cup arborio rice
• 1 ½ to 2 tsp kosher salt
• 1 cup crème fraiche
• 1/2 tsp white wine vinegar
• lemon wedges (for serving)
• pepper (for serving)