If a recipe calls for 1 cup of butter, use ½ cup butter and replace the other half with 1/4 cup of prune puree. You can make prune puree by pureeing 1 1/3 cups of pitted prunes and 6 tablespoons of hot water in a blender or food processor. This makes one cup of puree. For baked goods, you can replace 1 cup of butter, oil, margarine, or shortening with 1 cup of applesauce and still have a moist, great-tasting item without all the fat and calories.
You can also flavor vegetables with herbs. Use herbs in place of butter or margarine. Or use a little unsaturated vegetable oil. Many cookbooks have lists of herbs that bring out the flavor of foods. Try a few. You're apt to discover some new flavors that you like. Try basil on zucchini, for instance. Or use lemon pepper on broccoli.