What do you eat for breakfast when dieting?

Oatmeal, prepare in the crockpot and portioned out, a veggie omelet, or a smoothy.

I eat a piece of cinnamon raisin Ezekiel bread, toasted with Sunbutter, cinnamon and banana on it. Or I eat two eggs over easy. Both are quick to fix.

Do you like oatmeal? I have eaten instant oatmeal for breakfast for decades, and I find that it holds me till lunch better than anything else. (I certainly couldn't handle anything greasy in the morning.) Before I discovered the benefits of oatmeal, I used to eat cold cereal with milk, but I found that I would binge on the dry cereal. Can't do that with oatmeal! Plus, it has many benefits for your health. I've never tried steel-cut oats, and the instant kind has the same benefits as the kind you cook--it's just cut finer, so it's ready more quickly. Just add boiling water. I find that two envelopes = 1 serving for me, and I like to mix an envelope of the flavored kind with an envelope of "regular" (plain), to cut the sweetness.

It doesn't necessarily have to be "breakfast food" if you aren't finding options. Just make it a third meal of the day and incorporate the foods you like into that third meal.

I like smoothies so I can get all my fruits in one shot. Sometimes string cheese, nuts and an apple.

You don't have to eat breakfast foods in the morning- eat what you like.

Either instant oatmeal or English muffin with peanut butter

Protein. Leftover meat/fish from the previous night's dinner, turkey burger, eggs. Plus full fat Greek yogurt and a little fruit. 

ETA: That's not dieting, that's how I always eat. When I want to take off a few pounds I just greatly reduce the already reduced amount of starchy carbs I've been eating. 

I gave up sugar & white stuff, so this morning, I had 3 eggs - soft boiled. Just scooped them out into a bowl and ate them with a spoon.

Some mornings I'll have a shake - frozen fruit mix, yogurt, spinach, flax seed (ground) and almond milk.

We are reducing our sugar/processed grain intake, so for breakfast choices this week I have omelettes with spinach and goat cheese, bacon/tomato sandwiches on 100% whole grain toast, toast with avocado or almond butter, and plain Greek yogurt with fresh berries.

When I'm trying to lose a few pounds, I eat breakfast as I normally would. Coffee, fruit and a bagel, or toast and cereal. I go by the rule "Eat breakfast like a king, lunch like a prince and supper like a pauper."
It works for me. Slowly, but it works. I find I need and burn off the earlier calories during the day and then don't add much later in the day.