If it were me, I'd give the mali one insect (pinhead crickets for small malis *mali's still the size of a baby*, and small crickets for medium mali's and large for full grown) per month old it is, so if it is a one month old, then I'd give it one cricket, two months-2, until they shouldn't need them anymore. If it were me I'd give them a cricket maybe once a day, if they were a baby, then 1 time every 3 days.
You can keep fresh greens (in small bites if it is a small mali) in their environment all day that way if they want to eat and you're not around you will be fine.
-----
2 Mali Uromastyx-Ares & Apollo
2 Bearded Dragons- Draco & Hades
1 Saharan Uromastyx-Iris
1 Leopard Gecko-Kalypso
1 Tokay Gecko-Sid Vicious
1 Tarantula-Peter Parker
1 Amazon Red Head Parrot-Pancho
1 African Gray Parrot-Keya
1 Dog-Cheeka
3 Fish-no names
1 Beta Fish-also no name
1 Zebra Finch-Beeps (we used to have 5, but some went on a killing spree).