Sale made light work of CR La Vila as the hosts ran in nine tries to post a comprehensive 59-6 Amlin Challenge Cup win at Edgeley Park on Friday.
Sharks centre Johnny Leota bagged a hat-trick, and Miller kicked seven conversions to help their team bounce back from last week's loss to Brive.
The home side's bonus-point victory over the Spanish champions takes them to top spot - albeit temporarily - in Pool 5.
Leota scored the first of his treble after half-time, with Sale's other tries coming from Andrew Higgins, Luther Burrell, Cillian Willis, Richie Vernon and a penalty try.
Meanwhile, Stade Francais eased past Bucharest Wolves 49-3 at Stade Charlety in their Pool 1 hit-out.