I am thinking of trying the Whole30 in January, but my sticking point is breakfast. Currently, most of what I eat for breakfast involves full fat dairy in some form. I need some ideas that fit the following criteria:
chicken liver sauted in onion/green pepper with wilted spinach- ready in 5 minutes if you keep the veggies pre-chopped in the refrigerator.
You could make your own sausage patties with ground meat and spices of your choice with little to no salt, in the morning, just fry up a couple and serve with sauerkraut and avocado. I love soup for breakfast, and I make a lot of bone broth soups for dinner for the family, so I often will just warm up the leftovers, or just boil some broth and whisk in a couple of eggs with scallions for an egg drop style quick meal(maybe the eggs would be fine for you in this way since they taste brothy?). Or, you can just drop the idea that breakfast has to be any certain types of foods and just eat leftovers from your dinners every day!
^ I really like this acorn squash "porridge" for breakfast. If you roast a bunch of squash on the weekend, you can just pop it in the microwave with all the other ingredients and it'll be ready. I think it's good with a little ginger too, and strawberries work really well in it. You could also add coconut flakes or nuts to boost the calorie content.
^ This is another one I do; it takes about half an hour in the oven, but I usually just use that time to get ready. You could also cook it the night before and heat it up.
I don't like plain eggs either, but I'll often scramble a few eggs along with a large amount of chopped onion, green pepper, tomato, and spinach. If you're using enough veggies, you won't miss the cheese or have to choke down piles of flavorless scrambled egg.
Alternatively, you could mix 1/2 c almond flour, 2 eggs, 1/4 c canned pumpkin, a touch of baking soda and salt, and some cinnamon/pumpkin pie spice to make some pancakes. If you have the ingredients on hand, it's pretty painless and quick. They taste good if you make them at night and re-heat them as well.
If you want something quick, a lot of the paleo cookbooks have eggy muffin type things that are basically eggs and veggies baked in a muffin shape. It sounds like they're easy to take out of the fridge or freezer and heat up for a quick and easy breakfast.
Lately I've been really pleased with ground beef sauteed with green veggies and starchy veggies. I boil or roast the starchy veggies ahead of time and keep them in the fridge. In the morning I saute the ground beef and some greens, then add the starchy veggies at the end to warm them up. I find it very satisfying, and fairly quick to make. If you wanted it to taste more like typical breakfast, you could add some sage to the ground beef to make it taste like breakfast sausage.
I almost never bother to eat breakfast, but one thing that I do enjoy in the morning is canned oily fish, e.g. sardines or mackerel or herring. Can't say if the salt content is within your limitation, though.