Quincy police think a teenager is responsible for setting fire to Sprouts Inn this past March.
Officers arrested 18-year-old Alex Frieden on arson charges.
A fire broke out at the restaurant this past Easter morning.
The Quincy Fire Department quickly contained the small blaze in the front of the building.
Firefighters say someone set the fire in a pile of lumber at the front door.
It caused minimal damage.
That was the second fire to strike Sprouts Inn on north 12th street.
Owners were in the process of rebuilding after an early morning fire last June gutted the restaurant.
Frieden is in the Adams County Jail.