Meal frequency doesn't make much odds, I find. I just don't see the point cooking a small meal twice when you can cook (and eat) a big meal once, so I recently basically doubled the size of my breakfasts. Breakfast represents the amount of calories you KNOW you're going to burn in a day so you may as well go big. Dinner, on the other hand, should be adjusted to your actual appetite and activity level. If I train hard or spent the day tooling around the city, I'll eat a big dinner. If not, and I'm not hungry, I might just have a small omelette with some meat and veg, maybe, or even just some yoghurt.