For the dressing, place the anchovies, garlic, mustard, egg yolks, lemon juice, 1 teaspoon salt, and 1/2 teaspoon pepper in the bowl of a food processor fitted with the steel blade. Process for 30 seconds until smooth. With the processor running, slowly pour the olive oil through the feed tube, until the mixture emulsifies. Add the grated Pecorino and process just until combined. Transfer to a container and refrigerate until ready to use.
Wash the kale and spin it dry in a salad spinner. Remove the rib from each leaf. Stack the leaves and slice them thinly crosswise, as you would coleslaw. Place the kale in a large bowl and toss with enough dressing to moisten.
Heat 1 tablespoon of olive oil in a medium (10-inch) saute pan. Add the pancetta and cook over medium heat for 6 to 8 minutes, tossing frequently, until browned and crisp. Transfer the pancetta with a slotted spoon to a plate lined with paper towels. Add the bread cubes to the pan, sprinkle with salt, and saute for 5 to 7 minutes, tossing frequently, until evenly browned. Add the pancetta, toasted bread, and shaved Pecorino to the kale and toss with large spoons. Serve at room temperature.