This Halacha is an excerpt from our Sefer
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Food restrictions that apply past the 10th hour:
It is forbidden for any person to eat non-Chametz bread, drink a small amount of wine [or grape juice] or a large amount of any food from the beginning of the tenth hour of Erev Pesach until the nighttime. The tenth hour of the day is three Zmaniyos/fluctuating hours before sunset. It is forbidden to eat the above items past the 10th hour of the day even if one begins his meal prior to the 10th hour. However, one may eat a small amount of fruits or a small amount of vegetables, whether cooked or raw, or a small amount of meat, fish, cheese and eggs, and a small amount of all other foods.
 Admur 471:1
 Such as fried or cooked Matzah that has retained its blessing of Hamotzi.[See Admur 471:8] Or Matzah Ashira for those who allow eating it on Pesach. [Admur 471:1
 Admur 471:2 that one may not drink a small amount of wine, as it satiates, but one may drink a lot of wine, as it makes one hungrier, so long as one does not drink to the point of satiation.
 Piskeiy Teshuvos 471:1
 Admur 471:2
 Admur 471:1 that it is ¼ of the day, which is three hours, whether the days are long or short.
 See Admur 471:1
 Admur 472:2; Sephardim may eat a small amount of Kitniyos and Mezonos Matzah Ashira. [See Admur ibid and 8]