Easy Homemade Blueberry Cobbler

• 6 cups fresh blueberries

• 1/4 cup sugar

• 2 tablespoons cornstarch

• 2 tablespoons water

• 1 tablespoon lemon zest

• 1 tablespoon fresh lemon juice

• 1/4 cup sugar

• 1 and 1/2 cup all-purpose flour

• 1 and 1/2 teaspoon baking powder

• 1/2 teaspoon salt

• 6 tablespoons cold butter cubed

• 1/2 cup heavy cream

• 1 tablespoon Turbinado sugar

• ¼ cup chopped pecans

Vanilla ice cream for serving