My stepmother was overall a darn good cook, but she was able to completely ruin two dishes that I normally like a lot. First was beef stroganoff. Leftover roast beef cubed, Aunt Penny's White Sauce, and canned mushrooms. Nothing else. Always served over rice.

The second was lamb curry. Leftover lamb meat cubed, the same white sauce, bell peppers, and loads of supermarket 'curry powder'. Over rice.