In a large bowl, combine the ground veal, the minced garlic, fresh chopped sage, salt and pepper.
Divide the ground veal into 6 equal portions.
Shape each portion into large patties and make an indentation in the middle to prevent a burger bulge while cooking. (I used the handle of a wooden spoon).
Brush a stovetop grill pan with 1 tablespoon of olive oil and heat over medium-high.
Cook the burgers for 3 to 4 minutes on each side, turning once. (You can also use a regular frying pan). Repeat with the remaining burgers. Add more oil to the pan if needed for the second batch of burger patties.
Meanwhile, place the burger buns on a parchment-lined cookie sheet and brush both sides with olive oil.
Broil in the oven for about a minute on each side, just till golden brown. Keep an eye on them so they do not burn. Set aside while the burgers finish cooking.
Assemble the hamburgers by first layering a handful of arugula on the bottom half of the bun.
Top the arugula with the grilled veal patties, two slices of provolone cheese, the crisped prosciutto and the remaining top bun. (See below on how to crisp prosciutto)
Optional: garnish the top buns with grated Parmigiano-Reggiano cheese, crisp crumbled prosciutto, or crispy fried sage. (see notes below)