There is nothing wrong with using the odd tin or packet.
I put chicken breasts in the slow cooker with a tin of condensed mushroom soup and a pot of crème fraiche.
Sometimes that's it, usually it has mushrooms in it, some times it has leeks, sweetcorn and peas in it, sometimes I dole it out into foil dishes and add a pastry lid, this is often then frozen.
The easiest ever pasta sauce. It uses cream cheese
Cook pasta in water, turn off but do not drain.
Get a frying pan, put a tablespoon of cream cheese in per person and heat. Add one dessertspoon per person of the water the pasta is cooked in.
Drain the pasta and add to the pan.
If you want something more substantial fry mushrooms, onions, peppers, whatever is in the freezer first. You can top with grated parmesan.
InDubiousBattle
Can you do one plan for 2 or 3 weeks? Then you can just add in other things.
OK bung in oven meals.
pork fillet slices
potatoes
1 packet paxo stuffing
1 jar apple sauce
oil
salt and pepper
Slice the potatoes thinly, put on a baking tray drizzle with oil and add salt and pepper, toss the potatoes about so they are covered in oil
Add the pork slices on top
put apple sauce on each slice of pork
make up the paxo and completely cover the apple sauce with it
Bung in the oven for 30 mins - you will need some salad or a veg to go with it.
Another one
Sausages (I like Cumberland)
potatoes
onions
peppers
sweet potatoes
carrots or parsnips
Chop all the veg into wedges, put on a tray with sausages, a drizzle of oil and put in oven for 15 mins, turn everything over and cook for another 15 mins, it might need a bit more time.
A couple of bung in the slow cooker
Pork ribs
Passata
Chorizo
Tin of beans, cannellini or kidney
1 pepper
seasoning.
Put the ribs in the sc, they will make a sort of crown.
Drain the beans, chop the chorizo and pepper
put everything in the slow cooker and leave for 6-8 hours.
When you come back to it you can just pull the rib bones out. Serve with crust bread to dip in.
Chicken
Put the chicken in the slow cooker, switch on and leave (you can season it with herbs and black pepper)
Buy a mixed salad and some bread on the way home from work and let everyone make hot chicken sandwiches.
Drain the liquid from the sc but don't wash it, pull any left over meat off the chicken and freeze it to make a curry later.
Put the carcass back in the sc, and herbs some onion and garlic and in the morning add boiling water and leave - this will give you stock you can freeze or use.
French style onion soup.
Put the stock back into the sc. Finely slice onions (about 1 per person) and add to the stock. When you come home grill some baguette slices (or use frozen garlic slices) add cheese and grill again, serve in a bowl with the toasted bread floating on it.