Good-Cooking - Blueberry Pudding Cake

Ingredients

• 2 cups blueberries
• 2 tablespoons lemon juice
• 1 cup flour
• 2 teaspoons baking powder
• 1/4 teaspoon salt
• 1/2 teaspoon nutmeg
• 3/4 cup granulated sugar
• 1/2 cup milk
• 1 egg
• 1/4 cup butter, melted
• 1 teaspoon vanilla extract
• 1 cup granulated sugar
• 1 tablespoon cornstarch
• 1 cup boiling water