Winter Vegetable and Ricotta Tart - Good Neighbor Pharmacy

Ingredients

• 1 1/4 cups all-purpose flour
• 1/4 teaspoon salt, plus more to season
• 1/2 cup (1 stick) very cold, unsalted butter, cut in 1/2 inch cubes
• 6 medium carrots, peeled, thinly sliced
• 2 medium parsnips, peeled, thinly sliced
• 2 small sweet potatoes, peeled, thinly sliced
• 8 sprigs thyme
• 2 tablespoons olive oil
• Nonstick spray
• 1 16-ounce container ricotta
• 1 egg