- 3/4 cup (3 oz/90 g) raw almonds
- 6 plum tomatoes
- 2 red bell peppers
- 1 yellow onion, cut into slices about 1/2 inch (12 mm) thick
- 3 garlic cloves
- 2 Tbsp olive oil
- Kosher salt
- 2 Tbsp sherry vinegar
- 2 tsp smoked paprika
- 1/4 tsp cayenne pepper
- 4 lb (2 kg) mixed root vegetables such as carrots, parsnips, beets, celery root, and sweet potatoes, peeled and cut into 1 1/2-inch (4-cm) pieces
- 2 Tbsp olive oil
- To make the romesco, preheat the oven to 375°F (190°C). Spread the almonds on a large, heavy-duty baking sheet and toast in the oven, stirring once or twice, until fragrant and slightly darkened, about 10 minutes. Remove from the oven and immediately pour onto a plate to cool; the nuts can burn easily. Leave the oven on.
- On the baking sheet, toss the tomatoes, bell peppers, onion slices, and garlic cloves with the 2 Tbsp olive oil and 1 tsp salt. Roast until all the vegetables are tender and slightly charred, 15-30 minutes. As each vegetable is done, transfer it to a bowl. The onions and garlic will cook first, followed by the peppers and then the tomatoes.
- When all the romesco vegetables are done, transfer them to a blender or food processor. Add the vinegar, paprika, and cayenne and process to a smooth purée. Taste and adjust the seasoning. Set the romesco aside.
- Clean off the baking sheet, then add the root vegetables and toss with the 2 Tbsp olive oil and 1 tsp salt. Spread the vegetables in a single layer and roast until tender and nicely caramelized, about 40 minutes. Arrange the roasted root vegetables on a platter and pour the romesco sauce over them. Serve right away.