Lightened Up Nectarine Cobbler

For the fruit filling:

• 6 cups nectarines, pitted and sliced (you don't have to peel them!)
• 1/4 cup brown sugar
• 2 tablespoons maple syrup
• 3 tablespoons fresh lemon juice
• 2 tablespoons water
• 1 tablespoon cornstarch
• 1 tablespoon whole wheat flour
• Pinch of cinnamon

For the topping:

• 1 cup + 2 tablespoons whole wheat flour
• 3 tablespoons brown sugar
• 2 teaspoons baking powder
• 1/2 teaspoon salt
• 1/4 teaspoon cinnamon
• 1/4 cup unsalted butter, very cold and cubed
• 1 large egg, at room temperature
• 1/4 cup + 2 tablespoons whole milk
• 1 tablespoon granulated sugar

For the maple whipped cream:

• 1 cup heavy cream
• 1 teaspoon maple syrup