SPINACH-MOZZARELLA STUFFED BURGERS

Steps:

• In a medium bowl, gently mix together the beef, salt and pepper.
• Using generous 1/3 cup per patty, shape the mixture into 8 patties about 1/2-inch thick.
• Refrigerate while preparing the stuffing.
• Place the spinach in a dry large saucepan.
• Cover and cook over medium-high heat for 1-2 min or until wilted, stirring occasionally.
• Drain and cool.
• Squeeze out any excess moisture.
• Chop and place in a medium bowl.
• Stir in the mozzarella cheese and pesto.
• Mound about 1/4 cup packed stuffing in the center of 4 patties.
• Cover with the remaining 4 patties, and seal the edges by pressing firmly together with you fingers.
• Gently press the center of each patty to eliminate mounding.
• Heat the grill or grill pan to medium heat.
• Grill for 5-6 minute.
• Flip and grill for 5-6 min more or until no longer pink.
• Meanwhile, in a small bowl, whisk together all the mayonnaise ingredients.
• Place the buns, split side down, on the grill for 30-60 sec or until lightly toasted.
• Spread each bun with 2 Tbs of the mayonnaise.
• Top with a burger and some arugula, if desired.