Mexi-Casserole (Nebraska, 1987, adapted)

Mexi-Casserole is a quick and dirty weeknight casserole with Mexican-American flavors and a flaky biscuit crust.  In many ways it fits the archetype of post-war convenience food:   ground meat, mixed canned goods, and a Bisquick topping.  If you can brown hamburger you can make Mexi-Casserole.  At the center of the dish is a packet of……