ArrowDownFill 1arrow-small-lineFill 1Cooking Light - EasyCooking Light - FastCooking Light - So GoodCooking Light - How-ToCooking Light - Staff FaveCooking Light Badge - Wow!GroupClose IconEmailEmpty Star IconLike Cooking Light on FacebookFull Star IconShapePage 1 Copy 3Page 1 Copy 2Grid IconHalf Star IconFollow Cooking Light on InstagramList IconMenu IconPrintSearch IconSpeech BubbleFollow Cooking Light on SnapchatFollow Cooking Light on TwitterWatch Cooking Light on YouTubeplay-iconWatch Cooking Light on Youtube

Onion-and-Olive Tart

Photo: Becky Luigart-Stayner
Prep time 30 mins
Chill time 30 mins
Cook time 20 mins
Bake time 30 mins
Yield Makes 6 to 8 servings
Don't be put off by the anchovies; they provide subtle earthy-salty flavor, mild enough that only the most sensitive palate would notice.


  • 1 egg yolk, lightly beaten
  • 1 tablespoon heavy cream
  • 1/2 (17.3-ounce) package frozen puff pastry sheets, thawed
  • 1/3 cup olive oil, divided
  • 1 large sweet onion, thinly sliced
  • 1 tablespoon sugar
  • 2 tablespoons balsamic vinegar
  • 1 cup firmly packed fresh arugula or spinach leaves
  • 4 garlic cloves
  • 2 anchovy fillets (optional)
  • 1/2 cup fresh white breadcrumbs
  • 1/2 teaspoon fine sea salt
  • 1/4 teaspoon freshly ground black pepper
  • 2 tablespoons fresh lemon juice
  • 1/3 cup chopped green ripe or kalamata olives
  • Fresh arugula leaves (optional)

How to Make It

  1. Preheat oven to 375°. Stir together egg yolk and cream in a small bowl. Place puff pastry on a parchment-lined baking sheet, and cut 1/2-inch-wide strips off each side. Lightly brush each piece with egg wash. Place cut pastry strips on top of puff pastry to form raised edges, trimming as needed. Prick center of pastry with a fork. Chill 30 minutes.

  2. Heat 2 tablespoons olive oil in a large skillet over medium heat; sauté onion 10 minutes, stirring frequently. Reduce heat to low, add sugar and vinegar, and cook, stirring frequently, 10 minutes or until onion is a dark caramel color. Set aside.

  3. Purée arugula, garlic, and anchovies, if desired, in a food processor. Slowly add remaining 3 1/2 tablespoons olive oil; process until mixture is thick and creamy. Stir in breadcrumbs and next 3 ingredients.

  4. Spread arugula mixture over puff pastry, and top evenly with onion. Bake 30 minutes or until tart edges are golden brown and bottom is firm. Let cool to room temperature. Top with olives, and sprinkle with additional arugula, if desired. Cut tart into squares.