data assist does not offer the ability to create query groupings.
you could force the FoodPlan = 1 portion of the query to the end by adding it as a criteria in the data assist search.
another option if you are using MySQL 5 is to create a view in the database as:
SELECT RecipeID, Title, Serves, Intro, WhatYouNeed, HereHow, CountAs, CatagoryID FROM Recipies WHERE FoodPlan = 1
and set the recordset to use the view instead of the Recipies table.
see the following form more details on views: