My inclination would be to use the pellets.
If sown directly, there is more risk, particularly in light of your limited amount of seeds.
The pellets will give you more control until the seeds sprout and are somewhat established.
If you had lots more seeds you could simply sow 2 to 3 times as many as you need directly in the bed, thereby enhancing your odds of having plenty of plants in your bed
It is generally not a good idea to use a dome over a tray when in direct sunlight as it can heat up quickly and bake your seedlings.
As soon as the seeds pop up in the pellets, put them under direct sunlight. After a week or so,
plant the sprouts in your bed.
I agree with the above advice as to removing that mesh from the pellets before putting them into
their forever homes.