NLM possesses an untitled Persian treatise on general preparation of food and drink (MS P 26, item 2) which gives the author as Amīn al-Dīn Rashīd Vaṭvāṭ and specifies that it was composed for Arghun Khan who ruled from 1284-1291/683-690 H.
A much shorter treatise on the same topic, also written by order of Arghun Khan, is preserved in another untitled manuscript where the author is given as Amīn al-Dīn Rashīd al-Dīn Otaji. A Persian tabular treatise on the same topic written by Amīn al-Dīn Otaji and dedicated to Mahmud Ghazan Khan (who ruled from 1295-1304/694-703) is preserved in two copies. For both these treatises see Storey, PL II,2, p. 217 no. 373.
The treatise now at NLM, with author given as AAmīn al-Dīn Rashīd Vaṭvāṭ, is presumably by the same author whose name appears as Amīn al-Dīn Rashīd al-Dīn Otaji in other manuscripts.
This Amīn al-Dīn Rashīd Vaṭvāṭ cannot be the same person as Rashīd al-Dīn Vaṭvāṭ who lived in the 12th century and wrote in the name of the governor of Khvarazm (a northern province of Persia) to two prominent physicians in Baghdad, Abū al-Barakat al-Baghdad (d. 1165/560) and Ibn al-Tilmīdh asking them to recommend a physician from amongst their students who could take over al-Jurjānī's position as court physician following his death about 1136/531. For this earlier Rashīd al-Dīn Vaṭvāṭ, see Richter-Bernburg, "UCLA", p. 3.