Zak Whitbread and Martyn Waghorn put the Foxes 2-0 up before Theo Robinson replied, but David Nugent then came off the bench to score twice and secure a victory that lifts Leicester back up to third in the table.
"It was an outstanding start to the game for us. I think that's the best we've played," said Pearson.
"We totally dominated and to get two goals in that period was fully deserved.
"I was a bit disappointed that we were only one goal ahead at half-time, but I think we kept our composure well in the second half."
Pearson also singled out Waghorn, adding: "Over the last two or three weeks he's put in some very good performances for us.
"He's certainly contributed in a very positive manner and I think scoring his first goal, when we beat Ipswich, took a bit of pressure off him."