If you eat breakfast cereal with milk in the morning and a sandwich made from commercially-sold bread and meat for lunch I suspect you would have to try very hard to develop any micronutrient deficiency.

I didn't research it for more than five minutes, but I suspect someone on such a diet could easily develop a vitamin K deficiency. The DRI for males/females is 120/90 mcg/day, and I found no breakfast cereal, milk or bread that had anything close to that. There are too many lunchmeats to check, but the highest values I saw were in the 3 mcg / 28 oz range.