I am able to eat between 1/2 and 3/4 cup of food per meal.  Some days less than others, depending on the food I choose. 
I get full really quickly too...and I am finding lately the full feeling doesn't seem to last as long as it should.  My first fill is scheduled for July 16th, so I will discuss this with my surgeon and we can determine if I need a fill or not. 
I eat a bowl of cereal (rice crispies or bran buds w/sweetener and skim milk) for breakfast and I stay full until lunch. 
For lunch I eat a bowl of soup, creamy w/chunks or vegetable and if I am not full, an unsweetened pudding or apple sauce. 
For dinner, I have tried mashed potatoes, scalloped potatoes or rice (small amount), green veggies (brocolli or green beens) and fish or turkey(mashed). 
I find that my dinner never keeps me full all night, so I usually have a small snack of fruit, popcicle or fudgecicle mid-evening. 
I hope this info helps! 
Cathy