Caramelized Onion, Spinach, and Sweet Potato Tart Recipe from Jessica Seinfeld

Caramelized Onion, Spinach, and Sweet Potato Tart Recipe from Jessica Seinfeld

jessicaseinfeld.com

Step-by-step instructions to make Caramelized Onion, Spinach, and Sweet Potato Tart in just about 1 hour 45 minutes

View full recipe on jessicaseinfeld.com

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Cooking tools:

  • Mandoline
  • Rolling pin
  • Pastry brush
  • Mixing bowl
  • Whisk
  • Fork
  • Measuring spoon
  • Measuring cup
  • Parchment paper
  • Baking sheet
  • Plastic wrap
  • Pot
  • Spoon
  • Spatula
  • Cutting board
  • Chef's knife
  • Oven
  • Stove

Ingredients

  • 2 cups all-purpose flour, plus more for rolling
  • ¾ teaspoon kosher salt
  • 1/3 cup extra virgin olive oil
  • 5 to 6 tablespoons water
  • 4 tablespoons extra virgin olive oil
  • 1 large yellow onion, thinly sliced
  • ½ teaspoon kosher salt, plus more for the top
  • 8 ounces medium button mushrooms, sliced
  • ½ cup dry white wine, such as pinto grigio
  • ¼ teaspoon freshly ground black pepper, plus more for the top
  • ¼ teaspoon crushed red pepper flakes
  • 12 cups packed fresh spinach
  • ½ cup plant-based feta cheese, crumbled (We like Violife)
  • 1 medium sweet potato (about 10 ounces), peeled
  • Chopped fresh dill, for serving

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