Apple Cinnamon Baked Oatmeal

Ingredients

• 2 medium apples* (chopped)
• 2 1/2 cups 225 g quick-cooking or rolled oats, gluten-free if necessary
• 2 tablespoons ground flax seed
• 1 teaspoon ground cinnamon
• 1/4 teaspoon nutmeg
• 1/4 teaspoon allspice (optional)
• 1/4 teaspoon cardamom (optional)
• 1/4 teaspoon ground ginger (optional)
• 1 teaspoon baking powder
• 1/4 teaspoon salt
• 2 1/2 cups 590 ml non-dairy milk of choice
• 1/4 cup 60 ml grade A maple syrup
• 1 teaspoon vanilla extract
• 1/2 cup 50 g roughly chopped walnuts (optional)