I did when I was heavier too. What works really well is throwing in 2 or 3 chicken breasts into the cooking.
If you prefer, measure out about 100 calories of ground beef x 5 as it is for 5 days meal, and throw that in,
Gives you protien. Will even bulk it up alot so you have enough for 2 medium sized lunchs.
Will still stay way under your required calories.
I did this for a few months.