The Siyum Before the Meal
The Rebbe of Lublin ate one small meal a day, and only after he finished a masechta.
Rav Tzadok lived in Lublin in a poverty that surprised visitors. His wife kept a small shop that sold used clothing, and the family lived from that, while the Rebbe sat writing and learning, the pen and paper never leaving his table.
After the passing of his Rebbe he withdrew further, and he would not taste food until he had completed a masechta of the Talmud Bavli. Only then did he eat, and the meal counted as a seudas mitzvah in honor of the siyum. It was a single meal each evening: a glass of tea and a roll, or a little barley stew. On Rosh Chodesh he allowed himself a bit of salted fish in honor of the day. He kept this custom to the end of his life, and though the food was so little, he never looked thin and was always well in body.
He would not accept gifts from others. The one exception was the pidyon haben, which he treated as a mitzvah that belonged to him as a Kohen. He even used that money to buy seforim, and when he later received a salary from the community, he spent that on seforim too.
His chassidim understood that for him a meal was not a break from Torah. It was the close of a day of Torah, a celebration of something finished.
Source: Kuntres Tzidkas HaTzaddik (Machon Tiferes Radzhin, Bnei Brak, 5780), reprinting the biographical essays of Rav Isser Frankel and Rav Avraham Yitzchak Bromberg (from his series on the Rebbes of Poland).
Pick a short piece of Torah you can complete this week, such as a chapter of Mishnayos, one daf, or a page of a sefer you have been meaning to finish. Learn it before your largest meal of the day, and when you reach the end, say a few words of thanks to Hashem before you eat. You may find that the meal itself feels different when it follows something finished, and you will have a way of holding the day together.