I do recall something key in Yamataian culture; they were treating Nepleslian style food as an exotic delicacy back in YE 28, from what I recall during a stop-off on Yamatai when key members of the Sakura crew ate at a high-dollar restaurant, where 'down home country cooking' was truly something noteworthy to ingest. This would lead me to think that consuming bacon, eggs, pancakes, and other conventional westernized breakfast cuisine would be a distinctive treat, enough so it would explain why such food is being served as breakfast aboard the Plumeria, feeding a Princess of the Empire.
What also stands out and needs to be noted is Yamataian heritage being closely tied to Nepleslian eating habits. A high protein and carbohydrate saturated breakfast does seem to be the fare of choice for such a background influence. I would imagine, perhaps, some distinctively 'fusion' style cooking methods would be applied, especially to feed nekovalkryja, some ideas come to mind such as...
Bacon Fried Rice, With Extra Egg.
Biscuits, With Plum Jelly.
Hashbrowns With Sriracha Sauce.
Rice Based Cold Cereals - With Extra Sugar Added.
Egg, Tofu, Soybean, Pea, and Radish Omelet, With Optional Hotsauce.
Egg, Bacon, Potato, Mushroom, Radish, Onion, and Rice Stir-fry.
Salmon Omelets.
Meanwhile, a look at individual character breakfasts;
Miles Gunn had Lorath-Nepleslian fusion breakfast; Fruit native to Lor served in oatmeal, with a ham-like steak, and a crunchy honey-grain-and-nut bar. Dessert in the form of a biscuit-like muffin which includes a light glaze of a sweet-and-savory gravy like sauce, with cranberry-like fruit suspended within the biscuit. Beverages include a milk-and-coffee like drink, and fruit juice. - A supplemental 3oz of scotch is also an essential part of every breakfast.
Helen Klein had "SHOCKocolate Coated Anti-Matter O's, with EXTRA MINERALS AND METALS AND STUFF EXTREME", along with an 18oz steak served over a lattice of extra-thick bacon, three jumbo eggs - over-medium, three fluffy biscuits (She cleverly places the egg into the biscuits), and a fruit salad. Beverages included a meal-supplement shake with strawberry flavor, and a 32-oz coffee.
As for Lorath breakfast fare, generally, breakfast consists of grains and nuts slathered in honey or cream, fruits, and crispy fried meat in sparing quantity. Generally, Lorath breakfasts are not very 'complex' in presentation, often treated as a light but nutritional meal to ensure that no lethargy is produced by heavy meat servings, or excessively inflammatory foods. However, Fyunnen and some Lmanel are noted to increase their meat intake for breakfast due to calorie intake requirements, in which case they often consume syrup/honey glazed meats.
Traditional Helashio breakfast fare focuses entirely on fruit, grains, cheeses, and nuts. This is largely attributed to the need for traditional 'wild' Helashio which live in tribal communities to conduct a mid-day hunt for any meat, also, the Helashio metabolism favors meals focused upon carbohydrate intake and protein gained from dairy products.