Brown the hamburger, drain, and return to the pan. Add diced tomatoes(Rotel), green chilies, soup, and enchilada sauce, stirring till all are well blended. In a crock pot, pour half of the beef and sauce mixture. Tear tortillas into bite sized pieces and place a layer on top of the sauce mixture. Spread a generous layer(up to one package) of cheese on top of the tortillas. Repeat the layering process(sauce, tortillas, cheese). Heat on low 4 hours or on high for 2 hours. The enchilada casserole is done when the top layer of cheese is bubbly.