Ingredients

3 small red onions, cut into 1-inch-thick rounds 

Extra-virgin olive oil 

Kosher salt and freshly ground pepper 

1 small garlic clove, minced 

1/2 cup walnut halves 

Zest of one lemon plus 1 tablespoon juice 

1/2 teaspoon red-pepper flakes 

Flaky sea salt 

4 cups packed dandelion greens 

Preparation

Preheat oven to 450°F. Drizzle onions with some oil; season with kosher salt and freshly ground pepper. Place on one side of a baking sheet. Mash minced garlic clove and a pinch of salt with the side of a knife to form a paste.

Toss walnuts with 1 tablespoon oil and garlic paste; season with salt to taste and spread on other side of sheet. Roast until nuts are toasted, 5 to 6 minutes. Transfer nuts to a cutting board; let cool slightly.

Meanwhile, flip onions and continue roasting until just tender, 9 to 12 minutes more. Chop nuts and toss with zest of 1 lemon, 1/2 teaspoon red-pepper flakes, and a pinch of flaky sea salt.

Pile 4 cups packed dandelion greens on a platter; drizzle with 1 tablespoon each oil and lemon juice, and season with flaky salt. Top with onions, sprinkle with nut mixture, and serve.