My kid has all these allergies plus more (dairy, wheat, and others). We don't worry about fats. I just try to give her something safe that has carbs, protein and veggie/fruit. It's enough a challenge. She likes salami, smoked salmon occasionally, sandwich with olive oil and turkey. I recently found this "granola" butter which she loves. It's a spread made with oats, olive/coconut oil and maple syrup. Sometimes I make her a porridge (grits or buckwheat with coconut milk and maple syrup). Rice and pasta have been coming back uneaten...