Why can't you?
McDonalds figured this out 40 years ago, a Drive through.
Actually, I'm patenting a Drive-Thru (In Space, on a mobile device)
If it's a year and a half trip, send the first batch of food 1.5 years before leaving, the second 1 year before leaving, and the third 6 months before leaving.
The first one lands on Mars, the other two are put in orbit around the sun in a straight (ish) line to mars.
When the ship carrying people is 2-3 days out, accelerate the food to the speed of the ship so that they are travelling the same speed beside each other. Dock, and voila! Space Drive Thru