Chilled Yellow Potato and Tuna Causa
(kow-sah lee-men-nyah de ah-toon)
Para Picar y Empezar (The Front Porch Snacks & Starters)
In Peru, the potato is sustenance, history, and life itself. The Causa Limeña traces its name to the 19th-century War of the Pacific, when local women smashed native yellow potatoes with chili and lime to sell to troops, rallying with the cry, "¡Para la causa!" Today, this chilled, savory cask of vibrant potato dough, layered with creamy tuna salad and rich avocado, is a cornerstone of Peruvian home cooking. It is a masterclass in taking simple pantry staples and engineering them into something deeply nostalgic and undeniably elegant.
Before you start
Keep the jackets on.
Do not peel or chop the potatoes before boiling. Boiling them whole with the skin intact keeps the water out, preserving the dry, buttery texture you need to build the perfect dough.
Ingredients
- Yukon Gold potatoes2 lb
- Ají Amarillo paste4 tbsp
- neutral vegetable oil1/4 cup
- Key lime juice1/4 cup
- kosher salt1 1/2 tsp
- black pepper1/4 tsp
- canned tuna10 oz
- mayonnaise1/2 cup
- red onion1/4 cup
- fresh cilantro1 tbsp
- Key lime juice1 tsp
- Hass avocado1 large
- eggs2 large
- Kalamata or Peruvian Botija black olives1/4 cup
- cherry tomatoes1/2 cup
Method
- 01
Boil the potatoes.
Place the whole, unpeeled potatoes in a large pot, cover with cold water, and add a heavy pinch of salt. Simmer over medium-high heat for 25 to 30 minutes until a knife easily pierces the center.
- 02
Peel and hot-mash the potatoes.
Drain the potatoes. Working as quickly as possible while they are steaming hot (use a clean kitchen towel to protect your hands), slip off the skins. Immediately press the hot potatoes through a ricer or mash thoroughly, then let the mash sit for 15 minutes to cool and release excess steam.
- 03
Prepare the tuna filling.
Flake the drained tuna with a fork in a medium bowl. Mix in the mayonnaise, minced red onion, cilantro, and 1 teaspoon of lime juice until creamy. Season with salt and pepper, then stash it in the refrigerator.
- 04
Knead the cooled potato masa.
Once the mash hits room temperature, add the ají amarillo paste, vegetable oil, 1/4 cup lime juice, salt, and pepper. Dive in with clean hands and knead it like a soft dough until smooth, bright, and slightly citrusy.
- 05
Layer the causa.
Lightly oil a mold, a 3-inch pastry ring, or line a loaf pan with plastic wrap. Press half the potato dough firmly into the bottom. Arrange an even layer of salted avocado slices, spread the tuna mixture over it, and cap it tightly with the remaining potato dough.
- 06
Chill, unmold, and garnish.
Cover tightly with plastic wrap and refrigerate for at least an hour to let the starches set and flavors marry. Carefully unmold onto a platter and garnish with quartered hard-boiled eggs, black olives, and diced tomatoes before serving.
Notes
The hot mash is absolutely non-negotiable.
This is the ultimate grandmother's secret to a proper causa. If you let the potatoes cool before mashing, the starches seize up and turn to glue. Mash them while they are steaming hot, then let them cool before you add the flavors.