Introduction: While various ingredients can be combined at will, some famous home-cooked dishes are particularly beloved, such as beef stew with potatoes, braised tofu with catfish, and stir-fried wood ear mushrooms with green peppers. Besides cultural factors like tradition, these pairings are also quite scientific in terms of nutrition and texture.
Enhancing Umami.
Representative dishes: Beef stew with potatoes, chicken stew with mushrooms. Yun Wuxin, a popular science writer and a Ph.D. in Food Engineering from the Department of Agriculture and Biology at Purdue University, told reporters from Life Times that inosinates and guanylates in food not only produce umami but also have a "synergistic effect" with glutamates. When used together, the "umami" they produce is far greater than when used separately. Potatoes contain relatively high levels of glutamates, while beef contains not only glutamates but also a lot of inosinates and guanylates. When cooked together, the flavor is more umami. If you cook radish with beef, you can only rely on the beef to produce umami. Similarly, mushrooms (especially shiitake) are rich in guanylates, and chicken is rich in inosinates. During the cooking process, they both release free glutamic acid, creating an intense, irresistible umami flavor.
Improving texture and flavor.
Representative dishes: Papaya stew with pork ribs, radish stew with lamb. The wonder of ingredient pairing also lies in improving their flavor and texture. Li Huiming, a professor in the Department of Nutrition at Xiangya Hospital of Central South University, explains that in the case of papaya stew with pork ribs, papaya contains a special enzyme—papain, which is the main ingredient in meat tenderizers. It can hydrolyze the large-molecule proteins of animal meat into small-molecule peptides or amino acids, not only improving protein utilization but also making the meat more tender. The gamey flavor of lamb is unacceptable to many people. When cooked with radish, it not only neutralizes the "heat" of lamb but also has the effect of cutting grease and removing the gamey taste.
Promoting nutrient absorption.
Representative dishes: Braised tofu with catfish, stir-fried wood ear mushrooms with green peppers. No single food has perfect nutrition. Pairing different ingredients not only complements their nutritional value but also promotes the absorption of certain nutrients. Tofu has low methionine and high phenylalanine content, while fish is the opposite. When eaten together, they achieve excellent amino acid complementarity. More importantly, tofu is rich in calcium, and the vitamin D abundant in fish enhances the body's absorption of calcium. Therefore, braised tofu with catfish is an excellent calcium-rich home-cooked dish. In addition, vitamin C promotes iron absorption, making stir-fried wood ear mushrooms with green peppers a classic iron-rich dish.
Reducing harmful substances.
Representive dishes: Steamed pork with pickled mustard greens, stir-fried cured pork with green peppers. The cholesterol and saturated fatty acids in fatty meat deter many people. However, dietary fiber can help expel cholesterol from the body, reducing the harm of saturated fatty acids. Dishes like steamed pork with pickled mustard greens and soybean stew with pork ribs follow this nutritional principle. Nitrites react with protein decomposition products under acidic conditions to easily produce carcinogenic nitrosamines. Vitamin C is the most effective substance at inhibiting the conversion of nitrites into nitrosamines. Therefore, although cured meat contains a significant amount of nitrites, if it is cooked with foods rich in vitamin C, the formation of harmful substances is reduced. A typical example is stir-fried cured pork with green peppers.