Preparation Combine carrots, maple syrup, soy sauce, adobo sauce, and 1 cup water in a deep, large saucepan. Cover and cook over medium-high heat 10 minutes. Uncover, reduce heat to medium-low, and continue to cook, shaking pan occasionally, until liquid is completely reduced and carrots are coated in glaze, 2–3 minutes more. Meanwhile, whisk honey, salt, pepper, 1/2 cup mayonnaise, and 3 Tbsp. lime juice in a large bowl until smooth. Thinly slice half of onion to yield about 1/4 cup. Add onion, cabbage, beans, and 1/3 cup cilantro to bowl and stir to combine. Prepare a grill for medium-high heat or heat a grill pan or cast-iron skillet over medium-high; oil grate or pan. Grill carrots, turning once, until browned and slightly charred, about 2 minutes on each side. Transfer carrots to a plate. Toast buns until golden brown, about 30 seconds. Transfer buns to plate. Finely chop remaining half of onion to yield 3 Tbsp. Mix remaining 1/4 cup mayonnaise and 1 Tbsp. lime juice in a small bowl until smooth. Nestle 2 carrots into buns with large ends on opposite sides. Drizzle with mayonnaise mixture, then top with finely chopped onion, Corn Nuts, and 3 Tbsp. cilantro leaves. Serve with coleslaw alongside. Do Ahead Carrots and slaw can be made 3 days ahead. Store separately in airtight containers and chill.