The trick is to only eat meat about twice a week. Make lentil based dishes and vegetable based dishes the rest of the time.
it's cheaper and far healthier.
We have a chicken once a week, roasted...then I use the leftovers to make a curry or, if there's not much left, then a soup. I boil the bones for stock after I've taken the meat off.
Other good, cheap meals include a vegetarian bolognaise type dish which I add more veg than you would usually to, and bulked out with lentils.
I also make veg curry and sometimes falafels which we have with a big salad.
Baked potatoes with beans and cheese...and salad again...or with green beans or broccoli.
Veg soup with bread and cheese.
Sometimes we have fish if it's on offer..or perhaps a stir fry if I can get meat on offer...but stir fry is nicer with just veg.
You need to make sure you have a really good herb and spice collection. Things like fish sauce too...good oils...they make all the difference.