Grilled Beets with Burrata and Poppy Seed Vinaigrette

Whisk shallot, vinegar, poppy seeds, mustard, and orange zest in a medium bowl. Whisk in vegetable oil, then 2 tablespoons olive oil; season with salt and pepper. Set vinaigrette aside.

Peel and thinly slice 1 beet; set aside.

Prepare a grill for medium heat. Toss remaining beets with 2 tablespoons olive oil in a medium bowl; season with salt and pepper. Grill beets, covered, turning occasionally, until tender, 30–35 minutes. Transfer beets to a plate and let cool.

Meanwhile, toss scallions with remaining 1 tablespoon olive oil; season with salt and pepper. Grill scallions, turning occasionally, until charred, about 2 minutes.

Using a paper towel, rub skins from beets and cut into bite-size pieces. Toss beets and reserved dressing in a medium bowl. Place cheese on plates or a platter and top with scallions, dressed beets, and reserved beet slices.

DO AHEAD: Vinaigrette can be made 1 day ahead. Cover and chill. Beets can be grilled and peeled 1 day ahead. Cover and chill. Bring to room temperature before serving.