Keane, who scored the opening goal in the 37th minute, suggested that the Galaxy were on the road back to producing the kind of top-quality soccer they are capable of.
"I thought it was a great performance from start to finish," said Keane.
"Certain the way we played, the manner that we played - keeping possession, keeping the ball - sometimes an extra pass can open up the defense, and that was certainly the case today.
"I was fairly confident in the way that we were playing, and certainly the way we were training, that it was going to come.
"It's only been three games, so don't get too carried away, but it was a performance that I think has been coming for us for a couple games."
In agreement was Donovan, who had a hand in two of the Galaxy's goals: "Today was very enjoyable. I think we had a lot of fun playing today.
"As we get more comfortable with each other, that's going to get even better."
Keane was well-placed to give LA the lead in the 37th minute when he slotted home Dan Gargan's header from close range before Stefan Ishizaki grabbed his first MLS goal five minutes later with a deft chipped finish from a tight angle.
The season-first league victory for the Galaxy was then rounded out when Baggio Husidic opened his club account in the 56th minute when firing home from the edge of the area.
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