INGREDIENTS
1 lb
ground beef
3 oz
sliced pancetta, finely chopped
1 tsp
minced garlic
1/4 tsp
pepper
1/4 tsp
salt
1/4 cup
mayonnaise
1/4 cup
prepared pesto, divided
8 oz
mozzarella cheese, cut into 4 slices
4
Italian Rolls, split
1 cup
fresh arugula or baby spinach