How do I delete a custom food?? (iPhone)

I’m trying to give my eating habits a little cleanup these days. It’s easy to pay close attention to what I’m eating on the weekends when I’ve got tons of time on my hands to prepare delicious meals, but during the week when time is less available I feel the pull of convenience foods for their, well, convenience. Here’s what I try to live by when all I have is 30 minutes to prepare a "clean" meal.