Burgers with Mozzarella and Spinach-Arugula Pesto

Juicy beef burgers topped with fresh mozzarella and a homemade spinach-arugula pesto. These gourmet burgers combine the peppery taste of arugula with creamy cheese and a flavorful pesto mixed right into the meat.

6 servings
12 hr 40 min

Ingredients

  • 8 ounces baby spinach leaves
  • 2 cloves garlic
  • ½ teaspoon lemon peel
  • ¼ teaspoon dried crushed red pepper
  • 4 cups fresh arugula leaves
  • 3 tablespoons pine nuts
  • 1 teaspoon fresh lemon juice
  • cup extra-virgin olive oil
  • 3 tablespoons Parmesan cheese
  • pounds ground beef
  • 1 teaspoon salt
  • ½ teaspoon ground black pepper
  • 6 pieces hamburger buns
  • 6 slices fresh mozzarella cheese
  • 2 whole beefsteak tomatoes

Cooking Instructions

  1. 1.

    Rinse spinach; drain briefly, then place in large glass bowl. Microwave spinach, uncovered, on high just until wilted, 1 to 1 1/2 minutes. Drain, then squeeze out as much liquid as possible. Combine garlic, lemon peel, and crushed red pepper in processor; blend until garlic is finely chopped. Add spinach, 2 cups (packed) arugula, pine nuts, and lemon juice; process until coarse puree forms. With machine running, gradually add oil in thin stream and blend until almost smooth. Mix in cheese. Transfer pesto to small bowl; season with salt.

    10 min

  2. 2.

    Do ahead: Can be made 6 hours ahead. Cover; chill.

    360 min

  3. 3.

    Combine ground beef, 1 teaspoon salt, 1/2 teaspoon black pepper, and 6 tablespoons spinach-arugula pesto in large bowl; mix lightly with fingertips or fork just until incorporated. Form meat mixture into six 3/4-inch-thick patties. Place patties on platter.

    15 min

  4. 4.

    Do ahead: Beef patties can be made 6 hours ahead. Cover and refrigerate.

    360 min

  5. 5.

    Prepare barbecue (medium-high heat). Grill burgers to desired doneness, about 4 minutes per side for medium-rare. Grill buns, cut side down, just until lightly toasted, about 1 minute. Build burgers with pesto, patties, mozzarella cheese, tomatoes, and arugula. Cover with bun tops.

    15 min