Preheat oven to 425°. Line a baking sheet with foil.
Cut ⅛-inch-thick slits crosswise into potatoes, going most but not all the way through. (Potatoes should remain intact at least ¼ inch from bottom.) Brush with 2 tablespoons oil, and sprinkle with 1 teaspoon salt and black pepper. Place on prepared pan, and cover with foil.
In the container of a blender, place vinegar, bread crumbs, anchovy fillets, capers, garlic, lemon zest, red pepper, remaining ¾ cup oil, and remaining ½ teaspoon salt; process until finely chopped and well combined. Add parsley and cilantro, and process until finely chopped but not smooth.
Bake for 1 hour. Uncover and bake until fork-tender and lightly crisp, about 10 minutes more. Serve immediately with salsa verde and red pepper.
Recipe by Louisiana Cookin' at https://louisianacookin.com/6-recipes-for-a-christmas-eve-feast/