Spelt Crust Pizza with Fennel, Prosciutto, and Apples Recipe

Ingredients

• 2 cups whole grain spelt flour (8 ounces)
• 2 teaspoons baking powder
• 3/4 teaspoon fine sea salt
• 1/2 teaspoon sugar
• 1 cup whole-milk ricotta cheese
• 1/4 cup whole milk
• 2 tablespoons linseed oil or extra-virgin olive oil
• 1 large egg
• Coarse cornmeal, if using a pizza peel
• 4 or 5 green onions
• 1 cup sour cream
• 1/4 cup drained nonpareil capers
• 3/4 teaspoon freshly ground black pepper
• 1 Granny Smith apple, halved, cored, and sliced very thinly
• 1 fennel bulb, halved lengthwise, cored, and sliced very thinly
• 4 ounces thinly sliced prosciutto, cut crosswise into 1/2-inch-wide strips
• Linseed or extra-virgin olive oil, for brushing