This is nothing new and not my recipe but one I use to feed african cichlids predominantly but also occasionally to our community tank.
I basically alternate feeding between this and flake etc
The fish like it and it saves me $$$$$$$
FROZEN VEGE/SHRIMP FISH FOOD
1kg fresh or frozen veges, I find it easier to use frozen.
400 grams frozen cooked peeled shrimp
Gelatine
2 cloves of garlic
* Thaw the shrimp and blend with the garlic.
* Cook the veges until they are soft.
* Mix up 3 tablespoons of gelatine in about 1/4 cup of hot water and microwave it until it blends.
* Add everything into the blender and blend it.
* Put it into old fish bags, flatten it out and freeze it.
* To feed out to fish, simply snap off a piece and thaw it for a few minutes.