Chef Margarita's Tomatillo Tart - Rick Bayless

Ingredients

• 1 3/4 cups all purpose flour, plus extra to prepare the tart pan
• 1 tablespoon sugar
• Salt
• 7 tablespoons very cold unsalted butter, cut into small pieces, plus extra to prepare the tart pan
• 1/3 cup tapioca flour
• 1 pound tomatillos, husked, washed, cut into 1/4-inch slices
• 1 cup sugar
• Zest of 1 large orange (1/2 teaspoon)
• 1/2 cup toasted pecan pieces (divided use)