Method
Make Roasted Tomatoes
Halve tomatoes lengthwise; squeeze to remove seeds. In bowl, toss tomatoes with oil, pepper and salt. Place cut sides down on sheet pan. Roast in 250°F oven 3 to 6 hours (depending on moisture content of tomatoes) until shriveled but not dry. Cool; cover and set aside.
Place pancetta on rack on sheet pan. Bake at 400°F in oven for 10 to 12 minutes, until crisp. Remove from oven; cool. Cover and set aside.
For each serving, to order: Grill 1 beef patty to 155°F for 15-second hold. Place 3 Roasted Tomatoes on roll bottom. Top with burger and pancetta slice. Sprinkle 1 oz cheese over pancetta. Remove and cover with roll top. Plate and serve.