Tomatoes need a little extra love during winter. This pasta uses them in two ways: first melted into the pancetta drippings for a saucy base, then sautéed until gently blistered with the kale and garlic. Vary the green depending on what you have on hand; shredded Brussels sprouts, chard, or spinach would work. Orecchiette ("little ears" in Italian) have a catcher’s mitt shape that’s ideal for holding the crispy bits of pancetta. You could also use whole-grain shell pasta or rotini.