There are none! :D
Yam, yolk, and yarn eggs are some foods that start with the letter y.
Udon noodles
kumquats
Fish
doritoes
· honeydew
Agave or Alli or Anna or Ana
Idaho potatoes and Iceberg lettuce are some of the foods that start with the letter I.
According to some brief research, there are a few foods that start with the letter q, such as quiche, quinoa, quail, quince, quesadillas, and quahog.
Lunch foods that start with the letter w:Whopper (Burger King)watermelonwestern omeletwhite breadwhole wheat breadwiener (hot dog)
Breakfast foods that begin with the letter m:Marshmallow Alpha-Bits cerealmelonmilkMini-Wheats cerealMueslix cerealmuffin
Not sure if there are any food names, but here are some words that start with IP:6-letter wordsipecac7-letter wordsipecacs, ipomoea8-letter wordsipomoeas10-letter wordsiproniazid11-letter wordsipecacuanha, iproniazids, ipsilateral12-letter wordsipecacuanhas13-letter wordsipsilaterally