It is said that the Buddha teaches us to avoid extremes and instead to find our path down the middle. When it comes to food, one extreme could be the mindless eating that robs of you of your joy and health, and another extreme could be being so rigid and inflexible with your mindful eating practice that you lose the peace and balance such eating could provide.
Better to walk the middle path of patient effort, non-judgmental thoughts and flexibility. Over time, you will get to where you want to be by ridding yourself of obsessive behavior and inviting in a pleasurable, moderate approach.