Go to the market late and buy your veggies; prep and freeze some.
I always buy sacks of onions, cost is about £1.60 for red ones.
My root stew:
About equal parts of onions, carrots, parsnips, swede, potatoes' and perhaps a leek ( no celery; it doesn't work)
Saute onion and add some garlic if you have some.
Add thyme, salt and pepper, bay leaves and a small amount , perhaps half a teaspoon of cheapo curry powder.
Add other veggies, leave spuds in large pieces ,a tin of pulse of choice ( we like butter beans or chick peas) plus a few canned tomatoes or a little bit of passata.
Top up with water and a veg stock cube or a bit of Marmite.
Bring to a boil and simmer until done.
Lastly make some dumplings, SR flour and half the weight in fat, marge is fine. Some dried mixed herbs and a bit of seasoning helps.
Throw in the dumplings and simmer until they puff up.
Serve in a bowl and eat with a spoon and copious amounts of bread to soak up the juices.
I must warn you though; Senokot will not be required after this repast.