breakfast, eat prepared food
饔 centers on the morning meal: breakfast, or more broadly, eating food that has been prepared in advance.
饔 combines 雍 (likely phonetic) with 食 (food), suggesting a connection to prepared food or a morning meal. The exact historical development is uncertain.
The top part 雍 looks like a complex container, and 食 at the bottom is food. Imagine a covered dish of food prepared the night before, ready to be eaten as breakfast.
For ヨウ, picture a morning yawn (ヨウ sounds like 'yo') as you sit down to eat your prepared breakfast.