Near the entrance examination, parents have formulated the following recipes in order to increase nutrition for students: steamed bread as the staple food, braised beef and rice as the non-staple food, and steamed. Steamed bread and rice mainly contain sugar, braised pork mainly contains protein and oil, steamed Xijiang fish mainly contains protein, water and inorganic salts, yogurt mainly contains protein, and boiled water mainly contains water and lacks vitamins.

A Scrambled eggs mainly contain protein, so it's not right.

B, Steamed pork ribs mainly contain protein and oil, so it's not right.

C, stewed tofu mainly contains protein, so it's not right.

D, fried melon seedlings mainly contain vitamins, so it is correct.

So choose D.