Dolsot Bibimbap: Interfacial Retrograded Amylose Crystallization, Thermal Myofibrillar Pyrolysis, and Biphasic Capsaicin Lipidic Solubilization

Evolving from royal court food traditions into a global symbol of Korean culinary balance, the iconic hot-stone dish Dolsot Bibimbap stands as a spectacular thermodynamic monument to interfacial retrograded amylose crystallization, rapid surface myofibrillar pyrolysis, and complex biphasic capsaicin lipidic solubilization. The defining technological component of this dish is the *Dolsot*, a heavy, thick-walled bowl carved from native porous agalmatolite stone, which possesses an immense thermal mass capacity. The interior stone surface is heavily coated with toasted sesame oil (*Sesamum indicum*), a lipid phase rich in sesamol and monounsaturated fatty acids. A dense mound of cooked *japonica* rice is packed tightly into the base, followed by structurally isolated layers of sautéed seasoned vegetables (*namul*), minced beef, and a raw egg yolk. When the fully assembled vessel is heated over a direct flame to 220°C, a violent kinetic energy transfer occurs at the stone-rice interface. The starch granules on the outermost layer of the rice undergo intense thermal dehydration and non-enzymatic browning simultaneously. This induces a specialized starch retrogradation sequence, re-aligning loose amylose chains into a highly uniform, golden, and exceptionally crunchy crystalline shell known as *nurungji*. Simultaneously, the intense heat rises conductively through the dish, causing gentle protein denaturation within the egg yolk and vegetable parenchymal cells. The entire mixture is thoroughly agitated with *gochujang*—a dense, fermented chili paste. The sesame oil acts as a highly effective hydrophobic solvent, capturing and distributing the fat-soluble capsaicin molecules evenly across the starch lattices, providing a perfectly smooth, spicy, and smoky mouthfeel.