Shayon Harrison turned in Emmanuel Sonupe's shot to give us the lead in the first half at the King Power Stadium.
Harrison doubled his tally seven minutes after the interval, before Cy Goddard struck a spectacular third in stoppage time as the lads made a long overdue return to winning ways.
Leicester City U21s: Hamer, Johnson (Cain 46), Trialist, Watson, E Moore, L Moore, Muskwe, Miles, Blyth (c), Barnes (Rowe 46), Dodoo (Mitchell 52). Substitutes (not used): Knight, Maddison (GK).
Spurs U21s: Glover, Walker-Peters (c), Georgiou, Walkes, Amos, Bentaleb (J Pritchard 18), Sonupe (Owens 83), Lesniak, Harrison, Sterling, Miller (Goddard 72). Substitute (not used): Austin (GK).