Grilled Jalapeño-Marinated Steak Sandwiches With Charred Onions and Cotija Mayo Recipe :: The Meatwa

Ingredients

• For the Cotija Mayo
• 1/4 cup mayonnaise
• 1/3 cup finely grated cotija cheese
• 2 tablespoons sour cream
• 1 tablespoon lime juice from 1 lime
• 1 teaspoon chili powder
• 1/2 teaspoon cayenne pepper
• For the Marinade
• 1/3 cup juice from about 4 limes
• 3 tablespoons olive oil
• 2 medium jalapeños, stemmed and roughly chopped
• 2 teaspoons freshly minced garlic (about 2 medium cloves)
• 1 tablespoon dark brown sugar
• 1 tablespoon soy sauce
• 1 tablespoon apple cider vinegar
• 1 teaspoon Kosher salt
• 1 teaspoon freshly ground black pepper
• 1 pound hanger steak, trimmed of any hard fat and butterflied if thick
• 1 medium onion, cut into 1/2-inch slices and skewered horizontally
• 1 handful fresh cilantro leaves
• 1 baguette
• Extra-virgin olive oil, for brushing