Django Modelform ForeignKey Listing Problem

I have a staff list. I have a model for this as follows.

models.py:

class NumberOfMealsEaten(models.Model):
    month = models.ForeignKey(Months, on_delete=models.CASCADE)
    staff = models.ForeignKey(Staffs, on_delete=models.CASCADE)
    maelseaten = models.IntegerField("Number of meals eaten", validators=[MinValueValidator(0)], default=0)

    def __str__(self):
        return str(self.staff)

For these employees, the meal fee is calculated every month according to how many meals each staff has eaten.

First, at the beginning, I want to choose "the name of the relevant month" only once. Then I want the staff names from Foreignkey to be automatically listed as "text" in the template, not in the form of a drop-down menu. So I just want the "maelseaten" field filled in for the staff.

As an example, the list will look like this:

In other words, this form will add the number of meals for each staff member for the selected month to the database.

Thank you in advance for your attention and help.