Simple. Cut out all junk food. Cook from scratch. You stop wanting it when you don’t have it, and if you do slip, you feel so awful after that you don’t want it again.
so breakfast most days I have poached egg on toast
lunch usually pasta (I use brown rice pasta) or a jacket potato with tuna, sweetcorn, onion, pepper, cucumber and cheese, or nitrate free chorizo and broccoli with cheese, or leftovers
dinners are very varied and made from whole foods as much as possible. So chickpea and vegetable Thai green curry, chicken curry and rice, steak and sweet potato wedges and veg, bolognese, chilli from scratch, roast dinner (again everything from scratch like cheese sauce, Yorkshires). We do still have the odd less healthy meal like sausage and mash (the sausage being the unhealthy part!)
we only use real butter, full fat milk, extra mature cheese. everything is organic where possible
don’t fear fat, fear sugar and anything ultra processed.