Drowned Beef Sandwich with Chipotle Sauce (Torta Ahogada)

Details

Ingredients

• 12 ounces chipotle cooking sauce (such a Knorr®)
• 1 (14 ounce) can reduced-sodium beef broth
• ¼ cup chopped fresh cilantro
• 2 tablespoons vegetable oil
• 1 onion, thinly sliced
• 3 cloves garlic, minced
• 1 pound thinly sliced deli roast beef
• 4 bolillo rolls, halved and lightly toasted
• 4 sprigs fresh cilantro, or to taste