No...yes...not at all...yes...yes.
Not Repashy; I've tried that and don't see any benefit over my own secret recipe.
I use a mix of whatever is on hand at the time; fish, crickets, grasshoppers, krill, shrimp, nightcrawlers, mayflies, trout chow, commercial aquarium fish food, etc. makes up the protein side, and the veggie side is mostly duckweed, hair algae, sometimes dandelion greens, Hornwort and/or Guppy Grass (Najas) near the end of the summer when I have a glut of those. I think that FINWIN's insect trail mix (love that name!) would be a perfect component. Proportions vary depending upon what I'm feeding. I use way more meaty stuff for my Jelly Cat, but I've also made versions with more greens for things like Giant Goramy, Pacus, etc. Add VitaChem, powdered vitamins, even human vitamins as desired. I make sure nowadays to add some B1 to counteract the effect of Thiaminase-containing foodstuffs.
Chop the stuff up in a (dedicated) blender a bit; mix it up with some unflavoured gelatin, just barely enough to hold it together. You have to experiment a bit to get the right proportions. Let it set up in the fridge, then cut it into appropriate sized chunks and freeze them on trays so that they don't freeze up together. If you offer a chunk that's too big and requires the animal to shake it or bite it apart...it's a giant mess. You want pieces that are easily and quickly swallowed whole. Once they're frozen, I like to freeze individual feeding portions in separate ziploc baggies. Thaw on a plate, not in water.
This also lets me buy and use big bags or tubs of near-expired fish food, even if its in very small granulations which would be useless to me otherwise, since it just goes into the mix.
Not sure what I should call it; I'm kinda leaning towards John's Organic AquaGumbo. I can use a modified version of the Buckley's Cough Syrup motto (It tastes awful, and it works!). Something along the lines of "It stinks...but they eat it!"