Heat a pan, add butter, and then add wheat flour.
Mix the flour with the butter properly to form a smooth paste.
Add milk gradually and keep stirring to ensure no lumps form in the mixture. (Tip: I know I haven't added this in my earlier recipes but it's something I recently discovered thanks to my MIL's guidance—if you let the flour cool down before mixing it with milk. It'll ensure that no lumps form in the mixture. Also make sure you don't use hot or lukewarm milk. This tip will also help while making porridge.)
Bring the sauce to a boil while stirring continuously till the sauce thickens to a desired consistency.
Add minced chicken and salt, and then cook for a minute. (Please ensure that the chicken is cooked properly before you mince it. If your child's too small to chew the chicken, you can blend it fine using a mixer. It is best to ask your child's pediatrician when you can start feeding him/her chicken before serving him/her this dish.)
Add pepper powder and dried oregano.
Give it a good stir and then turn off heat.