Examples from my husband's diet. I might forget some of your allergens.
Oats. he eats them with freshly grated ginger and turmeric, apple, and flax oil. You might prefer something reasonable, like butter or coconut oil and cinnamon.
He has protein with breakfast, but eggs are out for you, so fill in whatever.
Snack: chia seeds in unsweetened vanilla almond milk. He doesn't do dairy.
Lunch: lean meat of some sort, quinoa or millet or buckwheat or beans/lentils, a fresh salad of stuff like fennel, apple, mint, really good olive oil, and whatever other veggies appeal to him.
Snack: hummus with carrots or whatever crunchy veg we have. I've seen him use cucumbers, jicama, fennel . . .
Dinner: whatever we make. Tonight, it was baked sweet potatoes, fauxtisserie chicken, and sauteed kale with onions.
Snack: apple or carrots with almond butter (homemade, no sugar). He often skips the apple/carrots and just uses a spoon.
He doesn't do lunch meat, dairy, shellfish, mushrooms, or pork. He has to limit sugar and histamine.
if you blend frozen berries with canned coconut milk, it's like soft serve if you eat it before the berries thaw. I'm allergic to carrots and prefer my hummus with tortilla chips, celery, or pappadums. And I prefer to eat my almonds freshly roasted and salted.
I like to strain yogurt, mix it with lots of garlic and onion (and their relatives) and eat it on cucumbers or celery. It's basically a spreadable cheese at that point.
Are you strictly low carb or low glycemic index? If it's the latter, you can have complex carbohydrates like lentils, beans, whole wheat products, etc. DH's caloric breakdown is 40% complex carb, 30% protein, 30% fat. Veggies are just thrown in randomly as they don't have a crap-ton of calories on their own unless they're starchy. You have a lot of options we don't: avocado, fish, pork, soy, etc. Mix it up! Have fun.