Casa Gallardo Mexican Restaurant 12796 Manchester Rd, Des Peres, MO63131 Casa Gallardo Mexican Restaurant serves authentic Mexican dishes. The menu features favorites such as chimis, burritos,…More enchiladas, quesadillas and tacos. Happy Hour is Monday to Friday from 2pm - 8pm. Margarita Wednesdays offers discounts on margaritas and Buffalo wings; the special runs from 4pm to 10pm. Tuesdays feature $0.99 chicken or steak tacos and $1.75 domestic beer specials; this deal runs from 4pm - close.