This versatile Peruvian potato dish makes a great light meal or a fine addition to a buffet spread. Causa can be layered with any number of fillings — chicken salad and tuna salad are favorites. Vegetarian fillings are posted here too. I put tuna salad in the ingredients so the computer would post it, vegetarian salad wouldn't go through. Served cold, causa rellena is often topped with extravagant garnishes and sauces for a colorful presentation. From whats4eats.