I used to have same problem (I'm La Diva's daughter, btw). My bloating was not to do with how much I was eating, but what I was eating. So... try cutting out allergenic foods.
Eg drink pineapple juice, not orange juice. Eat kiwis not oranges. Eat green bananas not overly-ripe black bananas. Eat brown rice (with a little oil on it) not bread. Drink a milk-substitute (I'm ok with soya milk) and cut out milk. Cut out tomatoes and replace them with other veggies and fruits.
NB. I'm not a qualified nutritionist, so do be sensible. If you are going to cut out foods from your diet, make sure you have plenty of good stuff to balance it out. Eg the calcium from milk can be replaced with lots of healthy fresh greens. Etc.
I found my bloating was an "allergy" problem, not a piggy problem! I say allergy in quotes because some doctors don't believe in allergies. However, Professor Bostroff has written an excellent book on intolerances and it was his book on allergic reactions that helped me.
Bon apetit! :)