Mississauga - Dundas/Hurontario Recs?
Everything in that immediate vicintiy is fast-foodish or takeout oriented.
I'm a big fan of Leaf Donair house which is in the plaza just north of Dundas, on Hurontario. The prices are well below the price limit you mentioned.
There's good Indian takeout at Eastern Foods as well. Haven't been there in awhile, but it's been fairly consistent over the years.