Method
Cook the potatoes
Scrub 900 g of yellow potatoes and place them in a large pot. Cover with cool water by about 2.5 cm (1 in) and bring to a steady boil over medium-high heat. Reduce to a lively simmer and cook for 20 to 25 minutes, beginning the doneness check at 20 minutes. The potatoes are ready when a thin knife slides through the center without resistance. Drain well and let excess steam escape for 2 minutes.
20:00Cook the chicken safely
While the potatoes cook, place 320 g of boneless skinless chicken breast in a clean saucepan and cover with water. Bring just to a simmer over medium heat, then lower the heat so the surface moves gently rather than boiling hard. Cook for 12 to 16 minutes, beginning the temperature check at 12 minutes. Use a food thermometer in the thickest part and continue cooking until it reaches 74°C/165°F. Transfer the chicken to a clean plate with clean tongs, discard the poaching liquid, and wash anything that touched the raw chicken before preparing the ready-to-eat filling.
12:00Hard-cook the eggs
Place 2 large eggs in a small saucepan and cover with cool water. Bring to a boil, reduce the heat to maintain a gentle simmer, and cook for 10 minutes so the whites and yolks are fully firm. Drain, cool under running water until comfortable to handle, then peel.
10:00Make the ají-lime potato mixture
Peel the potatoes while they are still warm enough to handle. Pass them through a potato ricer or press them through a fine-mesh sieve into a wide bowl; do not use a blender or food processor, which can make the texture gluey. Add 30 g of aji amarillo paste, 45 ml of lime juice for potato mixture, 30 ml of neutral oil, and 3 g of kosher salt for potatoes. Fold and press the mixture with a flexible spatula until evenly golden, smooth, well seasoned, and firm enough to hold a clean ridge. Spread it in a shallow layer on a clean tray and let it cool for 15 minutes.
15:00Prepare the chicken filling, avocado, and eggs
Shred the fully cooked chicken into short, fine strands and place it in a clean bowl. Stir in 60 g of mayonnaise, 15 ml of lime juice for filling, 2 g of kosher salt for filling, and 1 g of black pepper until the filling is creamy but not loose. Slice 200 g of ripe avocado into pieces about 5 mm (1/4 in) thick. Slice the peeled eggs into neat rounds for serving.
Layer and shape the causa
For 6 servings, line a straight-sided 20 cm (8 in) square dish with parchment; for another serving count, use a straight-sided dish with proportionally similar base area so the finished layers remain about 4 cm (1 1/2 in) deep. Press half of the potato mixture into an even base, compacting the corners without smearing it up the sides. Arrange the avocado slices in one overlapping layer, then spread the chicken filling evenly to the edges. Cover with the remaining potato mixture and smooth the top with a lightly oiled spatula. Let the assembled causa stand for 10 minutes so the layers settle before unmolding.
10:00Unmold and finish
Run a thin spatula around any exposed edges, invert the causa onto a serving platter, and remove the parchment. Arrange the sliced eggs and 40 g of black olives on top. Wipe the platter edge clean, cut with a thin knife, and serve promptly while the layers are cool and distinct.
Smart Substitutions
- No Peruvian yellow potatoes? Use Yukon Gold potatoes. They are less floury than russets and give a smoother, more cohesive layer.
- No aji amarillo paste? Blend roasted yellow bell pepper with a very small pinch of cayenne; the flavor will be milder and less fruity, but the color and gentle warmth will be similar.
- Prefer tuna? Replace the cooked chicken with well-drained canned tuna and keep the mayonnaise and lime quantities unchanged.
- No mayonnaise? Use thick plain Greek yogurt for a tangier filling, adding it gradually so the chicken mixture stays firm enough to layer.
Tips and Variations
- Rice or sieve the potatoes while warm; once they cool completely, they are harder to press into a supple layer.
- Taste the potato mixture before assembly. It should be noticeably lime-bright because the avocado and chicken soften the seasoning.
- Oil the smoothing spatula lightly rather than adding extra liquid to the potato mixture.
What Went Wrong?
- Potato layer is gluey The potatoes were likely overworked. Fold only until the ají, lime, and oil are evenly distributed, and avoid a blender or food processor.
- Causa cracks when unmolded Press each potato layer firmly into the corners and let the assembled dish stand for the full 10 minutes before turning it out.
- Chicken filling spreads The chicken strands may be too long or the mixture too wet. Chop the shreds shorter and fold in a little more cooked chicken.
- Potato mixture tastes dull Add a little more lime juice or aji amarillo paste, then balance with a small pinch of salt before assembly.
Nutrition Estimate
- Fiber: 5 g per serving
- Sodium: 510 mg per serving
Nutrition disclaimer:This recipe is provided for general cooking information only. Nutrition values are estimates and may vary by ingredients, brands, preparation methods, and serving sizes. Check ingredient labels and follow appropriate food-safety practices. This content is not medical, dietary, allergy, or professional food-safety advice.
