@Evianna83 you haven't given enough information IMHO - if you are time poor does this mean you have time to cook everything from scratch? The tone of your post is that you can't change anything.
Why look at just your grocery bill? You have to look at everything - maybe make compromises, changes, cuts to other parts of your life to enable you to spend more or more easily afford your groceries.
Go to your bank and look at the fixed outgoings - DD's etc - is there anything you can get rid of or reduce? I've reduce my monthly phone from £7 to £6, reduced the phone call services for my internet/phone line from £42 to £37.50. My gas/electric was £177 but I take readings every month - have them all in a spreadsheet going back years - I can see what I am using and I my actual monthly usage is now bouncing around between £124 and £154, I stopped using rinse on the dishwasher because better tablets made it unnecessary, I have looked carefully when buying my car, buildings and contents insurance - got rid of breakdown cover (gone with autoaid instead), got rid of legal aid, etc. I try hard not to use the oven and the heating (not on now) was turned down and we got used to it - wore more warm clothes. We shower less (runs off the boiler). Basically we really don't buy unnecessary things - we don't have any subscriptions to online services e.g. Sky, Netflix, Spotify, Disney, etc., I buy lots of fresh veg, fruit and cereals and pad out meals that have fish or meat in them - neither of us are keen meat eaters - I'd never buy chops, steaks, burgers, joints of meat - rarely eat sausages, bacon even less than that - we stick to porridge for breakfast - healthy and cheap - I make all of our bread in a breadmaker - slightly less than 2 loaves a week - make fresh sandwiches for both of us every day - salad, cheese, egg, tuna. Plus many other trivial things. We have a lot of things on regular order from Amazon - as much as I would prefer not to deal with them - toilet rolls, cleaning products, tea, coffee, dog biscuits, toothpaste, dishwasher tablets, washing powder, etc I could do what a lot of people have done - cut my landline - I probably will - I was self employed for 12 years and my landline is one of the numbers that was on my business info - I stopped in Nov so I probably don't need to keep it - it's in with my internet - it wouldn't save much - I still have to pay for line rental for internet - I might still do it though - in theory I could even hot spot my phones and get rid of internet at home but mobile reception is patchy in the house - we don't watch much live TV but do use iPlayer - streaming over the phone is clunky to we'd have to download the files and that would be slow.
If you want savings you have to believe you can find them and you have to be prepared to make decisions and to change what you do - you can't approach it in a half hearted way.