I'm thinking of feeding a meal my mother cooked for me to the dog
Why do you want to give your food to the dog?
My dog really loves people food.
It's good of you to want to make your dog happy. If people food is what makes her happy, I say go for it as long as the ingredients are appropriate for dogs.
I know her weight like the back of my hand. Also it's french fries not a meal.
I would be careful about fries, its only starch and oil she might feel a bit sick after. How about some boiled sweet potatoes instead?