With two men at home to feed, we rarely have leftovers; this is filling and delicious.
With two men at home to feed, we rarely have leftovers; this is filling and delicious.
Salsa acts as the primary chemical driver here, using its natural acetic acid and citric acid to break down heavy proteins in the beef while hydrating the starch molecules in the tortillas. Without adequate moisture from the salsa, the layered starches will absorb too much fat from the 27.5 grams of lipid content per serving, turning greasy rather than tender. Sour cream introduces lactic acid, which reacts with the cheddar proteins during baking to create a cohesive dairy emulsion rather than separating into oil pools. Dried onions require complete rehydration during the browning phase; failing to hydrate them beforehand draws moisture away from the surrounding meat matrix, leaving hard fragments in the final bake.
Baking this dish requires strict adherence to temperature and resting intervals to achieve structural integrity. Preheat the oven precisely to 350 degrees Fahrenheit. Covering the 9x13-inch pan with aluminum foil traps steam, allowing the tortillas to soften without scorching their exposed edges. Bake until the interior reaches a bubbling state, which typically requires approximately 30 minutes depending on thermal retention. Remove the foil during the final five minutes to let excess surface moisture evaporate while melting the reserved 3/4 cup of cheese. Allowing the pan to rest for exactly ten minutes off-heat enables the gelatinized starches and melted fats to cool enough for clean portioning.