Increasing fiber without increasing volume

Are there any fiber-rich foods (that are not supplements or heavily supplemented packaged foods) that aren't high in volume?  I am trying to reduce my consumption of high-volume foods to prevent myself from always having to feel really full instead of satiated to be satisfied.  But from my understanding, fiber comes from veggies and grains (I only have white rice at home - no other options), but veggies are really high-volume (plus my mom cooks with lots of oil!).  Are there any other ways that I can increase the amount of fiber I eat?  I used to get around 40g fiber every day, but now it's decreased to 15g, so lately I have been having problems when I need to do a #2.  Any advice would be appreciated!

you could try benefiber "sticks", which is a powdered drink you mix with water.  i guess each serving has 15cal and 3g (~12%) fiber.

also i like snack bars a lot for increasing fiber, like kashi's golean bars.  just be careful, one of the most fiber-ful bars i know, the fiber one chewy chocolate chip bar, also has tons of sugar!

p.s. - as i was loading another page, i just noticed the "not supplement" part.  whoops, sorry... hope this is of use anyways...

I'm not exactly sure what you mean by the supplemented packaged foods, but I will say that mini wheats are full of fibre! and iron! I needed more fibre and iron in my diet, and this was pretty great. I think it's something like 6 grams of fibre per serving of mini wheats. Probably around 200 calories, but it's good for you and doesn't fill you up in volume. Plus with milk you'd get calcium.

Another thing I noticed was the "Smart" section of pasta's, which taste just like white pasta's, but I saw on the rotini box that for 2/3 cup of pasta it had 9 grams of fibre and 11 grams of protein. I was pretty impressed with that.

For a snack I like popcorn. It's full of fibre and you can have it without butter, etc. I find it to be very light in volume when I eat it. A little goes a long way with popcorn.

Add a tablespoon of flaxseed meal to things.  Sprinkle it on just before eating, because the texture can get kind of sticky if you cook it in or leave it mixed in too long.  I put it on my oatmeal and on yogurt, and even on the tops of casseroles.

Try eating a fibre-rich breakfast in the morning. I like All-Bran with yoghurt and fruit; half a cup of all-bran has 9g of fibre.

Eat wholegrain/wholemeal/whole-wheat pastas and breads if you aren't already.

Beans, chickpeas, split peas and lentils are all good sources of fibre (and protein) - a small portion will give you a good fibre boost for the day.

Oh yeah, I totally forgot about beans and legumes.  Thanks!

As for the other suggestions, I totally understand about the cereals, but they are really expensive for so few servings, plus at home my family doesn't purchase them.  I can't purchase pastas either since the only grain my family consumes is white rice.  Thanks for all the replies though!