The recommendation is that foods should be introduced separately one by one every day and those that are most allergenic very carefully spaced out over 4/5 days.
If there is any family history of allergy, always ask the pediatrician for advice as to the right time to introduce a given food.
Foods that most commonly cause an allergic reaction are:
Milk, eggs, fish (white and blue), nuts, lentils and fruit such as peach, kiwi or strawberry.
As with any learning process that demands consistency and patience, don’t be anxious if your toddler does not eat a lot at first or turns down certain foods.
Until a baby accepts a food, it must be offered up to 15 times!
It is for this reason, and because they only eat small quantities at first, that many families go for Mixed BLW, including purées and pieces in the chosen format.