Torta De Milanesa with Quesillo and Pickled Jalapeno

Ingredients

• Leftover beef
• Milanesa
• 1 tablespoon butter
• 4 bolillo or telera rolls, halved
• 4 tablespoons mayonnaise
• 4 slices ham or head cheese
• 1 cup shredded quesillo or mozzarella
• 1/2 small white onion, thinly sliced
• 1/2 cup pickled sliced jalapeño and carrot
• 1 cup cooked black beans
• 1/2 small white onion
• 2 tablespoons water or bean broth
• 1 tablespoon olive oil
• 1 small clove garlic, minced
• 1/4 teaspoon salt