I agree with the others. AbsoLUTEly don't give in to her. She what's served, or she doesn't. Her choice. Do not give her the power of deciding! And if she wants dessert (usually a fruit or other healthy option) she'll finish what she's given. If you're worried about waste, as the others said start with very small portions.

Why should she have that kind of power to determine what you serve. No way!

I do the same. Daycare lunches are our leftover dinners. I find it easiest that way.