The Belgian international muscled away from Ciaran Clark down the left side before firing us into the lead from a tight angle with only three minutes played at White Hart Lane.
It gave us the ideal platform to go on and claim a 3-1 victory and continued the resurgent form of the 28-year-old, who was also on target at Bournemouth last week following his recent comeback from a foot injury.
Reflecting on his contributions of late, Mousa felt his early strike came as a great boost on Monday night but insisted he still has more to give.
“I was happy that I scored quickly tonight – I think that gave us more confidence to go on and win,” he said.
“When I got a sight of goal I just wanted to put it as hard as I could along the floor and I knew if I shot it hard it would pass the keeper somewhere.
“I’m happy with my form but I think I can improve much more. I hadn’t played for a long time until a couple of weeks ago – a month-and-a-half – but I feel like I’ve started to get fitter.
“In pre-season I felt really fit with the games I was playing and now I’m feeling that again and I’m happy with the goals as well.
“For me it’s something that has been my aim for a long time – to score more goals – and of course I’m happy with the two in the last two games but I want to continue. I don’t want to stop here, I want to keep scoring and be important for the team.”