Try a really delicious brown rice recipe every now and then, until your family gets used to the taste. If they ask for white rice, add lots of veggies, so they'll be eating less white rice. I suggest starting the grain switch by adding wild rice because it's more familiar to your family than brown rice. If your family won't eat whole wheat bread try rye or pumpernickel, or pick up some really delicious fresh baked whole grain breads at your local health food store. The mass produced breads aren't mouth watering enough to convert someone.
Some supermarkets sell fresh baked whole grain breads.
Semolina flour is white flour. The only way that semolina flour would be favorable is if the package label says that it's whole grain semolina flour. Check out Flash Cooked Tomato Sauces coming up in Monthly Recipes . The last step is to make the complete switch to whole grain pastas. Skip the Potatoes if you're trying to lose weight.