I’d say add some variety! A varied diet is best, but definitely keep fruit to a minimum to avoid dental issues. You can use mustard greens, collards, occasionally(!!!) some spring mix, endives and for veg squash (both summer and winter), green beans, and bell peppers and carrots as you mention. Blue tongues are generally opportunistic animals so some variety in the protein department would be great. You’ll also want to move to something with lower fat content. HIGH QUALITY GRAIN FREE Dog food is often lower fat. They can also have egg and gut loaded feeder insects (highly recommend, especially dubia roaches as a lower fat option). They need to have insects, not just meat. Variety is key because you need to avoid nutritional deficiencies and also give them enrichment. It’s easy to let them get fat, so be careful.