Martial, who scored a penalty in United's 1-0 win at Partizan a fortnight ago, doubled the lead in the 33rd with a deft finish after beating two defenders with neat footwork.
"And Marcus, I am very pleased he scores with his left foot because he'll need more goals with his left foot because he comes in from that position quite often, so he can go inside and outside of the full-back".
"There have been real signs of encouragement since we last played at Old Trafford", the United boss wrote in his pre-match programme notes. "Then we came through a tough Carabao Cup tie at Chelsea thanks to a bit of magic from Marcus Rashford". We created chances, there were smiles on the players' face, there were smiles on the fans' faces, and the coaches' faces, and we could have scored many more.
Having mustered just one shot on target across their previous two Europa League matches, they had seven against Partizan. It says everything about their form this season that victory over Graham Potter's side would be their first at home in the Premier League since mid-September.
United's 3-0 win means they are the only side to have not conceded in the competition, but the 22-year-old said his side must still do better. It is certainly not guaranteed; Brighton actually head into the fixture two points and two places above their hosts in the table.
Rashford spurned multiple chances before getting his goal five minutes after the re-start.
If Solskjaer wants to make changes he can look to his bench, where options available include Daniel James and Jesse Lingard. "I hope he will recover for Sunday, but I am not sure".
Manchester United legend Paul Scholes wasn't fully satisfied with his former team's resounding three-nil win over Partizan Belgrade in the UEFA Europa League.
Measles virus 'wipes out immunity to other infections'
Those antibodies are the blood proteins that "remember" past encounters with viruses and help the body avoid repeat infections. Rewers said rebuilding immune memory is not easy; it could require getting re-vaccinated, or getting sick all over again.
Cris Carter, Fox Sports divorce over serious issue
Front Office Sports reported on Monday that Carter reportedly had a "blowup" with his bosses regarding his frustration. Former NFL star Cris Carter is out at Fox Sports as First Things First co-host, the network announced on Thursday.