My sister-in-law is always taking good food and ruining it with weird ingredients. E.g., I'm at their family's place making guacamole (avo+garlic+lime+salt) and she gets really excited about her "secret trick" and adds freaking sour cream! Or I was helping re-use leftover chicken by crisping it up for tacos and she insisted on adding some gross taco flavoring packet, ugh! She always has these "tricks" that she's so proud about and that I'm afraid to tell her ruins the simplicity (and healthiness!) of food. But I'm a recent addition to the household so I'm afraid to push on this.... any tips?