Foryoueats: Hot Or Cold Creamy Lettuce Soup

Ingredients

• 2 tablespoons (30g) unsalted butter
• 1 medium onion (about 8 ounces; 225g), diced (see note)
• 4 medium cloves garlic, sliced
• 2 cups (475ml) homemade chicken or vegetable stock, or store-bought low-sodium chicken broth, plus more if needed
• 8 ounces (225g) lettuce, core and root ends trimmed, leaves torn if large (see note)
• 1/4 cup (1 small handful) loosely packed parsley leaves
• Kosher salt
• Fresh lemon juice, to taste
• Thinly sliced radish and pea shoots, tossed in extra-virgin olive oil, for garnish (see note)