Tevul Yom 3:2-3

T’vul Yom 3:2

If a beaten egg is on top of trumah vegetables and a t’vul yom touches the egg, he only invalidates the stalk that’s opposite the part that he touched; Rabbi Yosi says he invalidates the entire upper layer. If the egg was shaped like a hat (i.e., with a cavity underneath) it does not serve as a connective.

T’vul Yom 3:3

Let’s say that a streak of egg congealed on the side of a pan and a t’vul yom touched it. If he did so within the pan’s rim, it’s a connective to the food in the pan; if outside the rim, it’s not a connective. Rabbi Yosi says that the streak and everything that can be peeled away with it is considered connected. The same is true of beans that stuck to the rim of a pot.