Cream of Broccoli Soup

Bahan-bahan (6 porsi)

• 2 tablespoons unsalted butter
• 1 tablespoon extra-virgin olive oil
• 1 large yellow onion (diced)
• 1 ¼ teaspoons kosher salt
• ½ teaspoon ground black pepper
• 6 cloves garlic (roughly chopped)
• 1 medium -large russet potato (scrubbed and ½-inch diced (about ¾ pound), I leave the peels on)
• 2 heads broccoli (about 2 pounds, cut into florets)
• 4 cups vegetable broth or chicken broth
• 1 cup milk (I used 1%)
• 1 ½ tablespoons freshly squeezed lemon juice (plus additional to taste)
• ½ cup grated Parmesan cheese (not the kind in the can!)
• Pinch cayenne pepper (optional)
• Drizzle of heavy cream (optional)
• Finely chopped chives or parsley (optional)