In Portugal, potatoes covered with a velvety, sweet-spicy onion sauce are a national treasure. Although they aren’t traditionally prepared on a grill, you can still put your barbecue to work. Grill the potatoes, instead of boiling or frying, and use the convenient side burner (or your kitchen stove) to make the onion topping. You can use yellow cooking onions, Spanish onions, or white onions here.
1kgcooked yellow-fleshed potatoes, sliced into ¼" thick rounds
⅓cupextra-virgin olive oil, divided
½tspsalt, divided
4cupsthinly sliced onions (roughly 2 large onions)
6cloves garlic, thinly sliced
1tbspsweet paprika
1-2tbspchili paste (Portuguese pimento moida or other chili paste)
⅔cupdry white wine
2tbspchopped fresh parsley
Instructions
Cut a double-thickness length of heavy-duty foil to 24" long; fold in half crosswise. Unfold foil; mound potatoes on one side, close to the fold. Drizzle with 2 tbsp of the olive oil and sprinkle with ¼ tsp of the salt. Fold foil over; fold in sides and seal to form packet.
On side burner of grill, heat a large, deep skillet over medium-high heat. Add remaining olive oil. Once the oil is shimmering, add onions. Cook, stirring often, until golden, about 12 minutes. Add garlic, paprika, and remaining ¼ tsp salt. Cook, stirring, until fragrant, about 1 minute.
Add chili paste and wine, scraping up any brown bits. Reduce heat to medium-low and simmer, stirring occasionally, until onions are very soft and liquid is almost evaporated, about 5 minutes.
Meanwhile, pre-heat grill to medium-high (or cook on lit burners next to Spatchcocked Piri-Piri Chicken). Grill packet, turning once, until hot, about 20 minutes. Carefully open packet and transfer to platter. Top with onion sauce and parsley.
Notes
TIP: If you don’t have leftover cooked potatoes to use for this recipe, boil potatoes in salted water until fork-tender, drain, and let cool slightly.