Combine mayonnaise, dijon-style mustard, dill pickle relish, garlic powder and black pepper in a small bowl. Cover and refrigerate until ready to serve.
Spice-Rubbed Pork Loin:
Preheat the oven to 400 degree F. Combine the cumin, smoked paprika, thyme, salt, and pepper together in a small bowl. Rub all over the loin. Place on a rack in a small roasting pan. Roast for 10 minutes. Reduce the oven temperature to 350 degree F. Continue roasting until an instant-read thermometer inserted in the center of the roast registers 145 degree F, 50 to 60 minutes. Let stand for 10 minutes before carving.
Carve roast crosswise into thin slices. Divide slices into 24 portions. Spread each roll with remoulade. Fill with equal amounts of the pork and arugula. Top with a tomato round and 2 pieces of bacon. Serve warm.
Makes: 24 sliders, 12 servings