Place yuca, kabocha squash, achiote oil, sofrito, adobo, lime juice, and salt in a blender, then blend into a smooth paste and set aside.
Chicken filling
Season chicken breast with adobo, sazón, sofrito, salt, and oregano.
Cook chicken in a pan until tender, then add cubanelle pepper, red onion, garlic, lime juice, cilantro, tomato paste, and water. Cook until soft and tender, then set aside.
Assembly
Lay parchment paper down with a banana leaf on top, add a bit of achiote oil, spread a spoonful of yuca masa, and place chicken filling in the center.
Fold the banana leaf, wrap with parchment paper, and tie with butcher’s twine.
Boil pasteles for 35 minutes if cooking immediately or 1 hour if frozen.
Serve with a drizzle of ketchup, mayonnaise, and hot sauce. Buen provecho!