I. To evaluate the penetration of sapanisertib (MLN0128 [TAK-228]) across the blood brain barrier and achieve a concentration of 70 nM in tissue resected from a contrast enhancing region of the tumor in 60% of recurrent glioblastoma (GBM) patients. (Part I) II. To determine the ability of MLN0128 (TAK-228) to inhibit TOR complex (TORC)1/2 in the enhancing components of the tumor as determined by modulation of RPS6 phosphorylated Ser-235 (pS235) in reverse phase protein array (RPPA) assays. (Part II)