Instructions

1. 1

   Heat the grill to high. Divide the ground beef into 4 portions. Salt and pepper and press into patties.

2. 2

   Layer each patty with a slice of pancetta on top and bottom. Press the pancetta into the patty.

3. 3

   Cut the onion and mozzarella into rounds.

4. 4

   Melt the butter and mix it with the tomato paste and anchovy paste.

5. 5

   Cut the ciabatta buns and brush the insides with tomato-butter.

6. 6

   CAREFULLY brush the grill with oil or use non-stick grill spray. Grill the patties and onions at the same time. Grill the patties for 3-5 minutes per side and the onions for 1-2 minutes per side.

7. 7

   Once you flip the burgers, lay the onion rounds over the top of each patty, followed by the mozzarella slices. The cheese will melt while the burgers finish cooking.

8. 8

   Place the buns on the open grill and toast for 1 minute.

9. 9

   Once the buns are toasted, slather them with pesto.

10. 10

    Layer arugula leaves, tomato slices and a patty on each bun. Top and serve!

11. 11

    Serves 4.