How to lose about 20 pounds quickly?

I have been really wanting to lose about 20 pounds as quick as possible. The only problem is... I don't eat fruits or veggies. Well I mean the only fruits I eat are bananas and sliced apples and veggies I only eat corn and creamed spinage. And I'm really bad about snacking on stuff all during the day. Anyway I can change this?
How to lose about 20 pounds quickly?
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