The Sierra Leone striker struck in victory over Everton.
"This is a great, great moment in my life. It wasn't just any goal; it's a goal I will remember for ever," he said.
"But the kit man wouldn't let me keep my jersey so I'm going to have to talk to him about that."
The one-time refugee from his war-torn homeland, who only started playing after arriving in the States at the age of 16, admitted: "This is all a dream for me.
"My story is on-going and I'm just trying to add more to it. I am pushing myself to compete at the highest level and be better every day."