Is There a Problem with Spreading Foods (e.g., Peanut Butter, Cheese, Hummus, etc.) onto Challah, Matzah, etc. on Shabbos?;
דבר דבר (Dabair Davar): Annulling Vows on Shabbos;
The Difference Between the Place Where an Item Grew and the Place Where an Item Did Not Grow;