Not angelfish, but my discus (and tankmates), but I'm told it's good for angels too.
1 cup of mussels (raw if possible, cooked will do)
1 cup of shrimps (raw if possible, cooked will do)
1 cup of white fish (cod for example)
1/2 cup of peas, courgette, spinach, carrot and similar veggies
1 vitamin pill (human ones)
1 teaspoon of spirulina
3 cloves of garlic
I also add a level teaspoon of paprika because it's good for red colours. If your angels don't have any red just skip this.
Liquidize the lot.
Add equal parts of
- high quality flake (D-50 for example)
- dried bloodworm, tubifex, brine shrimp or daphnia
To dry up the liquidized food a bit and turn it into a thick paste
To thicken the paste I use agar agar, many people use gelatine which is just as good, I just find that agar agar holds better in the water.
Pour it in shallow containers to set and when set put it in the freezer.
Break off bits, defrost and feed to the greedy mouths.