The former Spurs midfielder relished grabbing a rare headed goal against his old employers and believes current manager David Moyes is key to the club's success
The South African - who had only scored one headed goal in his career before Sunday - was overjoyed at the final whistle as his side took all three points, and Pienaar gained a personal victory over the club that he left in the summer.
He told club's official club website: "What can I say, the past is the past. Now I'm back at Everton and you give everything for the club you play for. That's what I do and I was just lucky to get a goal.
"To score against your former club, it meant a lot to me and to the supporters. The timing was perfect. To score in the last minute, it was a special goal.
"The last [header] I scored was for Ajax in 2001 - my first goal in Europe. Today was only my second one so I'm quite pleased with it."
Pienaar was quick to heap praise onto his current boss David Moyes, who he says has brought a great belief to the team.
He continued: "I don't think we deserved to go 1-0 down. We had a few chances that we could have scored earlier, just the final pass in the final third wasn't that good. But we kept going, the supporters were behind us and lifted everyone.
"The gaffer, the belief he has instilled in the team is immense, so the character of the players is really good and we keep going until the last minute."