begin with (someone or something)
To start with someone or something; to have someone or something be the first in a series. Let's begin with stretching and then we'll move on to cardio. You'll all have time to share about your summer vacations, but Caroline, we'll begin with you.
begin with someone or something
to start off a sequence with someone or something. Let's have dinner begin with a nice clear soup. I will begin with Liz and take Frank next.