For hybrids I think you do better with natural treats like millet sprays or monkey nuts, small pieces of other nuts but only tiny amounts & not too often, a few extra sunflower seeds or pumpkin seeds in the shell are all very popular.
For chicken I use
this one which they love.
Baby food is best kept as either a very rare treat or used mostly for sick or elderly hams.
A little bit of porridge once in a while is fine.
For veg there is so much you can give them, broccoli is good, carrot not so much for hybrids so you could experiment with those & see what they like best.
This is my list if you're unsure what's safe.
Safe veg, those marked * are relatively high in sugar so only feed to diabetes prone species as an occasional treat if at all.
Asparagus (mine have never liked this)
Basil
Broccoli
Brussels sprouts
Common or red clover
Cabbage, green or red
Carrot*
Cauliflower
Celery
Chard
Coriander
Courgette
Cress (not mustard & cress as commonly sold together)
Cucumber
Dandelion leaves & flowers
Endive/chicory
Green beans/runner beans
Kale
Pak choi/Bok choi
Parsley
Peas/mange tout/sugar snap/snow*
Peppers, any colour
Potato/sweet potato cooked only*
Radicchio
Spinach
Squash/pumpkin*
Swede
Sweet corn/baby corn*
Turnip