Despite compelling information arguing to the contrary, many people still consume most of their food in two or three large meals every day, often going for hours at a time eating nothing in between. Sure, you can lose weight, and fat, on a reduced-calorie trio of meals, but you can't train your body to burn fat efficiently, which is key to maintaining weight loss.
A nutritious meal or snack every three hours or so stabilizes your blood-sugar levels, ensures adequate nutrients are constantly on hand, and helps control hunger-induced cravings for sweets and fats. It also leads to more effective glycogen storage in the liver and muscle tissues; thus, your body won't cannibalize muscle as an energy source during training.
So break your meals in half and spread them out. If you have trouble fitting in extra eating times at work, prepare food ahead of time that you can zap in the microwave or eat cold.