"Being led at half time was difficult for us because we'd had chances," Garde said in his press conference. "I think we deserved to win taking the 90 minutes as a whole.
"We sensed at the break that Bastia were beginning to find things tough and we were clinical in the second half.
"It's good to be back in the top half of the table. Now we need to recover and prepare well for the Marseille game."
Before they face Marseille this weekend, Lyon travel to Vitoria in the Europa League on Thursday.