Basil, Walnut, Sweet Onion Pesto - National Onion Association

Ingredients

• 4 tablespoons extra virgin olive oil
• 1 medium white onion, chopped (1 cup)
• 1 ½ cups packed fresh basil leaves
• ¼ cup chopped raw walnuts
• 5 tablespoons shredded parmesan cheese
• 1 tablespoon fresh lemon juice
• ½ teaspoon fine sea salt, or to taste