Sometimes I just want my girlfriend to cook at home more as opposed to always going out.
Why do you want this change?
I'm tired of eating out. I want to eat her cooking.
It's good that you value your wife's cooking, but you shouldn't force the issue. She should only cook when she wants to.
I want a better home life
Well then you can ask her if that is what she wants, and explain how you feel. If she agrees then great, and if she disagrees then you could potentially learn to cook yourself-- but forcing her to do something may hurt your relationship.