eating before and during training

Since hiring a sports nutrition coach I've been eating smaller healthier meals. I almost never eat until I'm full. The good news is my stomach has shrunk so I get full sooner. The bad news is my stomach can't handle my normal pre-workout meal anymore. I used to eat two cups white rice,  one cup milk,  and coffee. If i eat that now i feel overly full and uncomfortable while training. Now that I'm eating less for my pre-workout meal I'm running out of energy during my workouts. I've started sipping on a 16 ounce Gatorade with a half scoop of whey protein during my workouts. That seems to have fixed everything. I'm no longer overly full and I have energy to finish training.