Instant Pot Caldo Verde | America's Test Kitchen

Ingredients

• ¼ cup extra-virgin olive oil , divided
• 12 ounces Portuguese chouriço or linguiça sausage, cut into ½-inch pieces
• 1 onion, chopped fine
• 4 garlic cloves , minced
• ¼ teaspoon red pepper flakes
• 4 cups chicken broth
• 4 cups water
• 2 pounds Yukon Gold potatoes , peeled and cut into ¾-inch pieces
• 1 pound collard greens , stemmed and cut into 1-inch pieces
• 2 teaspoons white wine vinegar