Pork Sandwich with Romesco Sauce Recipe

Ingredients (24)

• For the Romesco
• 1 dry ancho chili
• 3 strips thick-cut bacon, chopped
• 3/4 cup drained canned or jarred piquillo peppers
• 3/4 cup drained and crushed canned plum tomatoes
• 1 medium yellow onion, peeled and thinly sliced (about 1 cup)
• 4 large garlic cloves, peeled and smashed
• 6 tablespoons olive oil
• 1/2 teaspoon smoked paprika
• Kosher salt and freshly ground black pepper
• 1 slice hearty white bread, torn into pieces
• 1/3 cup toasted slivered almonds or toasted skinned hazelnuts
• 2 tablespoons sherry vinegar
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• For the Pork
• 2 tablespoons olive oil
• 1 (1 1/2 -pound) pork tenderloin, cut crosswise into 1 inch-thick medallions
• Kosher salt and freshly ground black pepper
• 1 1/2 teaspoons smoked paprika
• 2 cups packed arugula
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• For the Assembly
• 4 (6-inch long) crusty rolls, such as ciabatta
• 1/4 cup mayonnaise (optional)