Recipe Details

Grilled Sweet Potatoes With Charred Scallion Mayo

May 27, 2024

A twist on traditional potato salad? Yes, please. One of Chef Tanya Holland’s favorite ways to serve sweet potatoes is by grilling them alongside green onions. She then blends the charred onions with mayo, lemon juice, and horseradish to create a dressing to spoon over the tender, smoky spuds. The best part is, you don’t need to peel or boil the potatoes: They go directly on the grill. To achieve the perfect grill marks, Holland recommends using a wire brush to clean your grill grates, ensuring an even cooking surface. And don’t walk too far away. Both the onions and potatoes have relatively short cook times so be ready to remove them as soon as they’re done cooking. (Using a combination of metal tongs and an easily maneuvered flipper makes that easy.)

Ingredients

4–6 servings

3

Tbsp. vegetable oil, divided, plus more for grill

3

large sweet potatoes (about 2 lb. total), scrubbed, sliced into ¼”-thick rounds

2

tsp. Diamond Crystal or 1 tsp. Morton kosher salt, divided

1

tsp. freshly ground pepper, divided

1

bunch scallions, trimmed

1

garlic clove, finely chopped

½

cup crème fraîche

½

cup mayonnaise

2

Tbsp. fresh lemon juice

1

Tbsp. prepared horseradish

¼

cup coarsely chopped parsley, plus leaves for serving
Flaky sea salt

Preparation

  1. Step 1

    Prepare a grill for low heat; oil grate with vegetable oil. Toss 3 large sweet potatoes (about 2 lb. total), scrubbed, sliced into ¼”-thick rounds, with 2 Tbsp. vegetable oil, 1 tsp. Diamond Crystal or ½ tsp. Morton kosher salt, and ½ tsp. freshly ground pepper in a medium bowl to coat. Place 1 bunch scallions, trimmed, on a rimmed baking sheet and drizzle with remaining 1 Tbsp. vegetable oil; turn to coat.

    Step 2

    Arrange sweet potatoes and scallions on opposite sides of grill. Grill sweet potatoes until charred in spots and tender, 10–12 minutes per side; transfer to a platter. Grill scallions, turning halfway through, until tops are charred and whites are tender, about 5 minutes.

    Step 3

    Transfer scallions to a food processor; pulse until finely chopped but not puréed. Add 1 garlic clove, finely chopped, ½ cup crème fraîche, ½ cup mayonnaise, 2 Tbsp. fresh lemon juice, 1 Tbsp. prepared horseradish, ¼ cup coarsely chopped parsley, and remaining 1 tsp. Diamond Crystal or ½ tsp. Morton kosher salt and ½ tsp. freshly ground pepper. Pulse until well combined.

    Step 4

    Drizzle sauce over sweet potatoes. Top with parsley leaves; sprinkle with flaky sea salt.

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