Blueberry Flax Seed Muffins

Name: Blueberry Flax Seed Muffins
Ingredients: 2 medium apples; 1 1/2 cups all-purpose gluten-free flour; 1 1/2 cups flax seed meal (See Note); 1 cup brown sugar; 2 teaspoons baking soda; 2 teaspoons cinnamon; 1 teaspoon kosher salt; 2 large eggs, lightly beaten; 3/4 cup whole milk or unsweetened almond milk; 1 teaspoons vanilla extract; 1 1/2 cups fresh or frozen blueberries; 1/4 cup whole flax seeds