Bumping this up. It's for stories and pictures too if anyone wants to add them.
I got this off a forum... I have no idea what reptile forum it was
and the person that posted it originally found it from an older book -I've changed it a little as it's better known now that tortoises shouldn't be fed meat.
Probably best if you're feeding 2+ turtles.
After all the ingredients are washed, they are ground up in an electric mixer and should produce a liquid with the consistency of honey. Heat this mixture to about 175 degrees F, stirring constantly to keep it from burning and from coming to a boil, which would destroy nutrients. Let it cool to about 140 degrees F and mix in gelatin powder along with one teaspoon of calcium and one quarter of vitamins per quart. Dissolve the vitamins in a little water before adding it, and use somewhat more gelatin than the directions call for because the gelatin may otherwise dissolve in the warm water of the terrarium. It is very important to stir the mixture thoroughly before it starts to gel so that the supplements are evenly distributed.
When the mass has gelled, cut it into individual servings and freeze in plastic bags. Later you can take out one package at a time, thaw it, cut it into strips, and feed these to the turtle. You create the flavor that appeals to your turtle by adding an extra handful of your turtle's favorite fruit, vegetable, or meat. One side benefit of this method of feeding is that there are hardly any leftovers to soil the water. As I have already said, this miracle food by itself is no substitute for fresh foods and should consequently not be used as a steady diet over long periods of time without the addition of fresh tidbits. But it is very handy during periods when we cannot devote as much attention to the care of our turtle as usual.
Change it to fit your turtle or tortoise's specific needs, or favorite flavor, use it to help get multivitamins and extra calcium into their diet. I've read of people using water out of cans of tuna to add scent and flavor. - I have not personally used this myself as I have no problems getting my bunch to eat their veggies, it would be good for those having a hard time or trying to get picky aquatics to eat more veggies. You can also add some pellets to the mix. Lasts about a week in a tupperware container in the fridge. If you freeze it do know that freezing destroys some B vitamins so you would need to supplement that fresh somehow.
You can buy premade gelled treats/food - but the ingredients are always questionable... like corn
And I'm never comfortable with feeding foods full of preservatives to reptiles - this includes any form of pellets. (To those who are dedicated fish keepers, a similar gelatin type mix is suggested over commercial foods for them, too)
For those with boxies, several keepers have had luck with "omelettes". They add a lot of veggies to the mix, vitamins, and leave the egg shells in. No butter or oil while cooking of course. Note that egg shouldn't be fed too often.
Personally, I make a "base" mix of veggies primarily consisting on butternut and acorn squash, and various other veggies - all carefully following the nutrition guides I'm pretty sure I posted on the first page or two. I make several pounds of this and freeze it in tiny ziplock baggies. Meals are supplemented with fresh veggies and greens, with vitamins added.
So you see, there are a few time saving and sneaky techniques for those picky turtles. Time and cost would be comparable to what one feeding their cats a raw diet would spend. And of course the health benefits are the same.