I got into a routine:
Breakfast: Greek yog (full fat) , frozen berries, a spoonful of granola
Lunch: Some protein (an egg, tinned sardines , but of ham or chicken etc), cottage cheese, lots of veg / salad, Or soup. And no more than one slice of wholemeal toast.
Snack: planned in advance so that you aren’t left staring at a cupboard full of biscuits. E.g an oat biscuit or two with 30g of Brie (I did measure out a portion to begin with to give myself an idea), or a cup of sugar free cocoa and a satsuma, or some grapes and something
Normal dinner, but reduce portion size of carbs and up the veg. Avoid deep fried.
And I did have the occasional cake and choc, a wine or beer maybe 3 times a week. But was trying to eat less sugar anyway as this was a health reset, of which weight loss was a part. It took a few days to break the sugar habit and get used to eating a bit less.
i easily lost 1lb a week.
I made cheap filling salads, my favourite being ‘zingy slaw’: shredded red cabbage and carrot with lots of lime and ginger and a bit of oil (I liked sesame to enhance the vaguely Asian feel of this) . A big bowl to last 3 days. Can be picked at as v v low cal.
As this was pretty much normal eating it fitted in with a family diet and established habits that have made it easy to maintain. I did this in lockdown and have not struggled to keep the weight off since.