How can I lose weight without resisting toothsome food?

My mom makes the most delicious food, which is iresistable to my tastebuds. But now i am at a point where i fear i might be puting extra weight. I want to workout, but i am working 7 days/12 hours a day. Its really hard to stay motivated when you are exhausted from work and good food accompnies you. so anyone have an idea how i can stay motivated to work out.