I'm lazy and have started to drink a protein shake for breakfast instead of eat cereal. As an athlete, your body needs a foundation of carbohydrates at each meal to fuel your muscles. Some protein is important to build, protect, and maintain muscles, but too much protein displaces carbs. Athletes should target 3 to 5 grams of carbohydrate per pound of body weight. That's at least 450 grams for the 150 pound athlete.
Cereals also offer more fiber and other health-protective nutrients than do engineered foods.
Hence, I recommend you be responsible instead of lazy. No engineered food can match the complex balance of nutrients designed by Nature. I think I should supplement my diet with protein powder, but I don't have much money to spend on protein shakes. Packaged protein shakes are indeed expensive. Blend for a minute ot two, until the ice is gone.