Pork Sandwiches with Cilantro-Jalapeno Slaw

INGREDIENTS

• 1 whole Onion, Peeled And Quartered
• 1 whole Pork Butt (pork Shoulder Roast)
• Salt And Pepper
• 1 can (11 Ounce) Chipotle Peppers In Adobo Sauce
• 2 cans Cola (Dr Pepper, Coke, Etc.)
• 2 Tablespoons Brown Sugar
• 12 whole Good Quality Kaiser Or Deli Rolls
• 12 Tablespoons Butter
• 1/2 head Cabbage, Sliced Thin
• 1/2 head Purple Cabbage, Sliced Thin
• 1 whole Jalapeno, Halved Lengthwise And Thinly Sliced
• 1/2 cup Whole Milk
• 1/2 cup Mayonnaise
• 1 teaspoon White Vinegar
• 1 Tablespoon Sugar
• 1/4 teaspoon Salt
• 1/4 teaspoon Cayenne Pepper
• 2 cups Cilantro Leaves, Barely Chopped