I give my bluey Gizmo a mix of vegetables, fruit and proteins (proteins sourced from dog food (natures gift brand) or mince meat). Froze the mix into an ice cube tray after blitzing in the processor to make for easier serving. Current mix consists off chicken breast (diced, boiled), egg (whole, raw), capsicum (1/4 of a medium sized one), bok choy (2 bunches), cucumber (1), mushroom (100g), peas, corn, brocolli, carrot (2), banana (1/2 of one) and fig (one). This makes enough for five-six ice cube trays. A lot of these vegetables/fruits are moderation only, but with the amounts being small I think there is a bit of leeway, although the next batch is going to have more 'frequently' foods instead of mostly 'in moderation only' foods.
For treats, boiled egg, gutloaded wood roaches, gutloaded crickets or gutloaded mealworms are provided (not all at once). Every third feed is supplemented with Calcium & D3 supplement (Reptical). Every fifth feed is supplemented with vitamins (Reptivite).
Gizmo gets one frozen cube daily (defrosted first), with a teaspoon of proteins mixed in. He/she is only four months old hence the daily feeds (frequency will be reduced with larger feedings as he/she gets older, Gizmo currently defecates daily so I believe feed amounts/frequency is ok). I'm not going to attempt to offer any advice as I've only had a Blue Tongue for three weeks.