Can I eat this? Cooked mince

I deforested mince meat yesterday and cooked spag Bol in the evening. I have left overs in the fridge, is it ok to eat today for lunch? I can’t figure it out on google as it’s talking about just defrosting it but I’ve cooked it 🙈 If you know a website that explains all of this I’d appreciate it as we’re trying to budget and eat left overs but it’s all new to me