Can you save my rubber breasts?

[SaveRubberBreasts]

Sorry for the clickbait!

Yesterday, I cooked 5 chicken breasts with soy sauce and ginger to make Chicken Ramen (wagamama recipe). They were at 200c fan and cooked for 50 minutes in middle of the oven uncovered. They came out pale-ish so I thought they were fine. They rested for 15 minutes before slicing. When we bit into them they were so chewy. Not dry just really rubbery. They were bog-standard Sainsbury's chicken with plenty of use before days left.

I have 4 chicken breasts left in the fridge. Is there anyway to make them less rubbery and chewy? Should I rehydrate them somehow or chop smaller and fry off? We will suffer eating them as too salty for foxes and cats to eat but would love ideas to make them a bit more palatable. Thank you so much 😜

Fabulous advice! Thank you everyone. I didn't realise about marinating soya too long.
Yeah I've had overcooked (by me!) whole chicken before and I recognise the dryness but yesterday's chicken breasts weren't dry they were chewy and rubbery like halloumi and it's not the first time either as the last two deliveries of Sainsbury's the breasts were like this.
I'm actually looking forward to dinner thanks to your delicious ideas :)