Modern Spice author Monica Bhide, at right. Her rice pudding and mango parfait, one of the recipes in the new book, is pictured at left. Just a few years after her decision to leave her job as an engineer and consultant for a life of full-time cooking and writing, it seems like Northern Virginia resident Monica Bhide made the right choice. Bhide, who has published two Indian food cookbooks and has a third, Modern…