The scoreline could really have reached double figures were it not for an inspired display by home keeper Danny Potter, who made an incredible 15 saves - mostly via his fingertips.
There were two changes from Saturday's starting line-up at Birmingham, Edgar Davids stepping in for Wayne Routledge and Radek Cerny taking over in goal from Marton Fulop.
Broadhall Way appeared to be packed to the rafters in the evening sunshine and fans were queueing up outside some two hours ahead of kick-off.
Teemu Tainio began as a makeshift right full-back, but it was from the other flank that the boys carved out the first opening when Benoit Assou-Ekotto linked up with Robbie Keane to supply Jermain Defoe inside the area. The little hitman squared but a home shirt was first to react.
Ghaly tried his luck from 25 yards before Stevenage had the ball in our net when George Boyd sped through - although the flag was up good and early. Defoe then set his radar for the top corner and it took a superb save from Potter to deny him a spectacular opening.
There was a promising tempo to procedings and the play was sharp and incisive - Tainio impressing early at full-back and he supplied a particularly inviting cross onto the head of Berbatov. The Bulgarian tested Potter after being played in by Keane while, at the other end, former Luton man Tony Thorpe headed narrowly wide from a Boyd cross.
Ledley King set off on a surge on 24 minutes before Davids took up the baton and drilled in a rasping low drive that Potter did well to turn round his right hand post. He was having quite a night of it in the first third and diverted a Keane curler skywards moments later.
The lead should really have been secured after 31 minutes when Defoe forced another tip of the fingers save from Potter, only this time the ball ran loose and into the path of Ghaly about three or four yards out. It won't be one the midfielder will want to store for long in his memory bank.
Just two minutes later the livewire Defoe was responsible for opening the scoring after Davids and Assou-Ekotto combined to present him with the ball inside the area. With his back to goal, he spun in an instant and fizzed his shot high past Potter.
A piece of Defoe magic set up Berbatov to inspire another save from the goalkeeper, moments before Keane did likewise and then Berbatov again.
There was a switch after the break with Wayne Routledge coming on for Ghaly and taking over from Tainio at right back, with the Finn reverting to his more natural midfield habitat.
Spurs Academy product Ronnie Henry - grandson of Double-winning Ronnie - was introduced by Stevenage, possibly to add an extra layer of protection from the razor sharp Defoe, who latched onto Berbatov's cut back from the right in a flash - only to see his effort go just wide.
Potter again thwarted Defoe ten minutes into the half when a goal looked the likely outcome after the striker burst through to the left of the area, with Keane guilty of missing the target a few minutes later when teed up by Berbatov.
Stevenage rallied and established a foothold in the game over the second half, managing plenty of possession without really troubling Cerny.
Phil Ifil replaced Keane with 15 minutes remaining, allowing Routledge to push further forward on the right flank.
The referee pointed to the penalty spot on 81 minutes after Berbatov was felled in the area by a combination of Santos Gaia and Luke Oliver. Berbatov himself did the honours and was super cool in stroking to Potter's right and into the net.
There was another penalty three minutes from time when Defoe was tripped on the run by Ieuan Lewis and - with Berbatov off the pitch in a swap for Lee Barnard - there was only going to be one taker and Potter was beaten again to his right.
Barnard could have made it four in stoppage time following a darting raid down the left by Routledge, but his header was nodded just the wrong side of the post.
Jermain Defoe struck his fourth and fifth goal and Dimitar Berbatov his third of the pre-season programme as Stevenage were defeated 3-0 at Broadhall Way on Tuesday evening.