As we all know Americans see Breakfast as being the most important meal of the day. However, Russians see it differently. Instead Lunch is there most important meal.
The Russian breakfast is usually a small portion. Many Russians eat bread with coffee in the morning or leftovers from the previous day. As opposed to an American breakfast which is a much bigger portion size and usually a typical cultural American breakfast can be seen as eggs, bacon, toast, hash browns, and pancakes which are all eaten with one sitting.
The second meal of the day is the largest for Russians. Their lunch usually consists of a salad, soup (soup can sometimes be doubled to be the entree as well), and a plate built around a meat and two sides. Roasted vegetables are usually the main side for this meal. An American lunch is usually much smaller portioned. It usually consists of some sort of sandwich, or burger. With a side of fries or chips. Salad is also very popular as a meal at this time.
Dinner for the Russians is smaller than there lunch meal. It only consists of zakuskas (appetizers), which is usually accompanied y hot tea or vodka. An American dinner consists of a main meal centered around a meat and two sides with a salad that comes before hand.
So from what I have researched Americans sit down to two larger portioned meals, breakfast and dinner, with there first meal being the most important. While Russians sit down to two small portioned sized meals with there largest meal, Lunch, being presented in the middle of the day.