A side built on contrast
Roasted sweet potato and pineapple make an easy pairing: the potato brings warmth and substance, while pineapple adds juice and tartness. Lime, scallions and a little chile keep the combination from tasting too sweet. Serve it beside grilled vegetables, beans or thoroughly cooked seafood when you want a side that feels generous without needing a heavy dressing.
For about four side servings, use two medium sweet potatoes, roughly two cups of fresh pineapple chunks, two scallions and one lime. You will also need a little neutral oil, salt and, if you like, a small fresh chile or a pinch of chile flakes. Choose pineapple that tastes pleasantly tart as well as sweet. If it is especially juicy, drain the cut pieces briefly so they do not soak the roasted potatoes.
Roast the potatoes for browned edges
Heat the oven to 425°F (220°C). Peel the sweet potatoes if you prefer, then cut them into roughly three-quarter-inch pieces. Keeping the pieces close in size helps them finish together. Toss them with enough oil to coat lightly and a generous pinch of salt, then spread them on a large baking sheet. Leave space between the pieces rather than piling them up; a crowded pan traps steam and makes browning harder.
Roast for about 25 to 35 minutes, turning once, until the pieces are tender in the center and browned at some edges. Ovens and potato sizes vary, so use their appearance and texture rather than the clock alone. Let them cool on the pan for a few minutes. Warm potatoes can absorb dressing well, but very hot potatoes will soften delicate scallions and release more steam into the salad.
Add pineapple and a bright dressing
While the potatoes roast, cut the pineapple into bite-size pieces and thinly slice the scallions. Put the lime juice in a large bowl with a tablespoon of oil and a pinch of salt. Add a little finely chopped chile if you want heat, then taste the dressing. It should seem distinctly tart: the potatoes and pineapple will mellow it. If your lime yields little juice, add another squeeze rather than thinning the dressing with water.
Add the warm, not steaming, potatoes to the bowl and turn them gently to coat. Fold in the pineapple and scallions just before serving. A spoon or flexible spatula will keep the potato pieces more intact than vigorous tossing. Taste again for salt and lime. If you have cilantro on hand, a small handful can add freshness, but the salad works without it. For crunch, finish with a scattering of toasted pumpkin seeds right at the table.
Make-ahead steps and serving ideas
You can cut the pineapple and scallions and mix the dressing ahead of time; keep them covered in the refrigerator. Roast the potatoes in advance too, then refrigerate them once they have cooled. For the best texture, rewarm the potatoes briefly in the oven before assembling, or serve them at room temperature. Add the pineapple, scallions and any crunchy topping near serving time so the salad does not become wet or lose its contrast.
This side is flexible at the table. Leave out the chile for a milder meal, or offer it separately so guests can adjust their portions. If serving the salad with seafood, keep raw seafood and its juices away from the produce and use clean utensils and surfaces. Citrus brings flavor, but citrus curing does not make raw seafood equivalent to cooked seafood. Refrigerate leftovers promptly in a covered container; the potatoes may soften after dressing, but the flavors will still work together.
