I used to snack on junk food too. It's not easy to break this habit. Especially when you want to restrict yourself because you know that you gain weight eating this.

Is it just now or did you always snack on such foods? I'm asking because usually there are always chemical reasons for our organisms to go on high sugar foods. Obviously we needed some sugar or energy. Now when it comes to sugar why not go for fruits or even fried fruits (just chose fruits that don't have added sugar or that is not that much). Do you like them? Because I personally love some dried pineapple or dried coconut or even apricots and prunes. They are still sweet and have sugar and are like dessert, but I think that they are better choice for snack than biscuits.

The next idea I would give is raw nuts. Do you like nuts and are you allowed to eat them? One oz almonds, walnuts or hazelnuts, even cashew nuts is a good snack too. Well at least for me. That's why I'm asking if you like them.

Other idea is vegetable sticks. I think that there are carrot sticks that you could use for snack.

And why not a cup of plain Greek yogurt (without the added fruits or sugars in it)?

Snacks that take a little bit more time are the various smoothies. That work too when you are home and have time to prepare them.

Advise - just don't by junk food and this way you will be less tempted. Instead buy fruits, nuts, yogurt etc. Healthy snacks and with the time (yes it will be struggle of course) you will go for them more than for the biscuits, candy bars and cakes.