Prepare the Bocadillo de Salmón: Cut the rolls in half lengthwise. Drizzle with oil. Toast the bread in a toaster oven or under the oven broiler on low to golden brown.
Spread cream cheese on the bottom half of each roll. Layer the smoked salmon, red onion slices, and fresh dill on top of the cream cheese. Season with salt and black pepper to taste. Close the sandwiches with the top halves of the rolls.
Serve the sandwiches with chips, pickle, and iced tea.