For the Muffins:
Preheat oven to 375 degrees F (190 degrees C).
Grease muffin cups or use paper muffin liners.
Make the apple sauce by stewing the apples mixed with lime juice, brown sugar and cinnamon. you can store this in an airtight container for up to a week.
Mix together wheat bran and milk, and let stand for 10 minutes.
In a large bowl, mix together applesauce, egg, brown sugar, and vanilla. Beat in bran mixture. Sift together all-purpose flour, whole wheat flour, baking soda, baking powder, and salt. Stir into bran mixture until just blended. Add chocolate chips.
Scoop into muffin cups.
Bake in preheated oven for 15 to 20 minutes, or until the edges have browned and the top is set.
For the Apple Sauce:
Put the apples and water in a saucepan. Cover and bring to the boil.
Boil over low heat, stirring occasionally, 20 minutes. Stir in sugar and cook until it dissolves. Add cinnamon.
Store in a jar and refrigerate.
You can substitute apple sauce for butter in many baking dishes.
Key Ingredients: Egg, brown sugar, all purpose flour, whole wheat flour, baking soda, baking powder, salt, raisins, apples, lemon juice, cinnamon