This is a chickpea and sweet potato burger topped with pol sambol — a Sri Lankan fresh coconut relish made with red chili, lime, and onion. The patty is spiced with cumin and cayenne, and the pol sambol does the heavy lifting that ketchup or mayo would normally do. It takes about an hour start to finish and makes four solid burgers.
The short version of why this works
Two things matter here. First, the sweet potato has to be properly mashed — not just roughly broken up — so it binds the chickpeas and breadcrumbs into a patty that holds its shape in the pan. Lumpy mash leaves air pockets, and the patty falls apart when you flip it. Second, the 20-minute fridge rest before cooking is doing real work: it lets the breadcrumbs absorb moisture from the sweet potato and firms the whole thing up. Skip the egg in the mix — it makes the patty mushy and you don’t need it when the sweet potato is mashed well. The pol sambol is mixed raw and served cold, which is exactly right; cooking it would kill the brightness that makes it worth making.
Shopping notes
- Fresh grated coconut: This is the one ingredient worth tracking down. Frozen grated coconut (thawed and squeezed dry) works well. Desiccated coconut is too dry and too sweet — it changes the texture and flavor of the pol sambol significantly.
- Red chili powder: Use a pure ground red chili, not a chili seasoning blend. Blends contain cumin, garlic, and other spices that will muddy the sambol.
- Cooked chickpeas: Canned are fine. Drain and rinse them, then pat dry with a paper towel. Excess moisture is the main reason veggie patties fall apart.
- Gluten-free breadcrumbs: Any plain GF breadcrumb works as a 1:1 swap. Panko also works but produces a slightly coarser texture.
Leftovers and meal prep
The uncooked patties keep well in the fridge for up to 3 days — stack them with parchment between each one and store in an airtight container. They also freeze raw for up to 2 months; freeze them flat on a tray first, then transfer to a bag once solid. Cook from frozen over medium-low heat, covered, for about 7 minutes per side. Cooked patties reheat fine in a dry skillet over medium heat for 3 to 4 minutes per side, or in a 350°F oven for 10 minutes. The pol sambol is best made fresh but holds in the fridge for up to 2 days in a sealed container — the lime juice keeps it from browning, though it will get a little softer. Make a double batch of patties on Sunday and you have lunch sorted for most of the week.
Common problems and fixes
- Patties fall apart in the pan: The mix is too wet. Pat your chickpeas and sweet potato dry before mixing. If the formed patties still feel soft, add another tablespoon of breadcrumbs and refrigerate for an extra 10 minutes before cooking.
- Patties stick to the skillet: The pan isn’t hot enough before you add the oil. Let the skillet heat for a full minute on medium before adding oil, then let the oil shimmer before the patties go in. Don’t move them for the first 3 minutes.
- Pol sambol tastes flat: Add lime juice last and taste as you go. Coconut varies in sweetness, and you may need more acid than the recipe calls for. A small pinch of extra salt also helps the flavors come forward.
- Patties are bland in the center: The spices need to be evenly distributed. Mash the chickpeas first, then mix in the spices before adding the sweet potato and breadcrumbs, so the seasoning gets worked through the whole mixture.
- Bun goes soggy fast: Spread a thin layer of pol sambol on the bottom bun only right before serving. If you’re packing these for lunch, keep the sambol separate and add it when you’re ready to eat.
Sri Lankan Pol Sambol Veggie Burger
Ingredients
Burger Patties
- 1 cup cooked chickpeas drained and rinsed
- 1 cup sweet potato cooked and mashed
- ¼ cup breadcrumbs gluten-free, if preferred
- 1 teaspoon ground cumin
- ½ teaspoon cayenne pepper adjust to taste
- 1 small onion finely chopped
- 2 tablespoons fresh coriander chopped
Pol Sambol
- 1 cup fresh coconut grated
- 1 small red onion finely chopped
- 1 tablespoon lime juice freshly squeezed
- 1 teaspoon red chili powder adjust to taste
- ½ teaspoon salt or to taste
To Serve
- 4 medium burger buns toasted
- 4 small lettuce leaves
- 1 large tomato sliced
Instructions
- Prepare the Burger Patties: In a large bowl, combine 1 cup of cooked chickpeas, 1 cup of cooked and mashed sweet potato, 1/4 cup of breadcrumbs, 1 teaspoon of ground cumin, 1/2 teaspoon of cayenne pepper, and a small finely chopped onion. Add 2 tablespoons of chopped fresh coriander to the mixture.
- Form the Patties: Mix the ingredients well and form into four equal patties. Set aside in the fridge to firm, about 20 minutes.
- Make the Pol Sambol: Combine 1 cup of grated fresh coconut, a finely chopped small red onion, 1 tablespoon of freshly squeezed lime juice, 1 teaspoon of red chili powder, and 1/2 teaspoon of salt in a bowl. Mix thoroughly.
- Cook the Patties: Heat a non-stick skillet over medium heat. Add a splash of oil and cook the burger patties for about 4-5 minutes on each side, until golden brown and heated through.
- Assemble the Burgers: Toast the burger buns if desired. Layer each bun with a lettuce leaf, a patty, a generous spoonful of pol sambol, and a slice of tomato. Top with the other half of the bun.
Notes
- To enhance the flavors, consider using a charcoal grill for cooking the patties, as it will impart a smokier taste.
- If fresh coconut is not available, use desiccated coconut, although this might slightly change the texture.
Nutrition
Common questions
Can I use canned coconut milk instead of fresh grated coconut for the pol sambol?
No — coconut milk will make the sambol a wet sauce rather than a textured relish. The whole point of pol sambol is the chewy, slightly coarse texture of grated coconut holding the chili and lime. Frozen grated coconut is the best substitute for fresh.
Can I make the patties ahead and cook them straight from the fridge the next day?
Yes, and they actually cook better that way. A longer chill firms the patties more than the 20-minute rest, so they hold together more reliably in the pan. Just make sure they’re covered so the surface doesn’t dry out.
How spicy is this, and how do I dial it back for people who don’t like heat?
With the full amounts of cayenne in the patty and red chili powder in the pol sambol, it’s a noticeable medium heat. Cut the cayenne to a pinch and reduce the chili powder in the sambol to half a teaspoon for a mild version that still has flavor. Don’t skip the chili entirely in the sambol — a small amount is what makes it taste like pol sambol rather than just coconut salad.
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