Hashem makes our food beautiful !
a luscious apple colored brightly red with complex streaks of pink wrapped in a waterproof wrapper, a beautiful aroma, and a complex mixture of tastes, sweetness, tartness, acidity, all balanced together for a gourmet experience, a texture not too hard and not too soft, the juices packed into little packets so as to not all spill out at the first bite.
why does He do it. so what if an apple was grey?
Hashem beautifies our food for all our senses, sight, smell, and taste, to bring us the most enjoyment possible.
and to demonstrate to us his kindness and his wonders.