Ingredients: Red onion, Ground beef, Dried tomato and arugula, Mozzarella cut into 6, Olive oil for brushing onion, Hamburger buns grilled, desired, FOR THE PESTO, Packed arugula washed well, spun dry, Drained bottled dried, oil, Olive oil, Freshly grated Parmesan, Pine nuts toasted golden, cooled,
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