I think the first question I would ask in such a situation is 'what can I eat'.
For instance grains and starchy vegetables that provide the basis for meals include oats, rice, buckwheat, potatoes and sweet potatoes.
Seeing there is little restriction on fruits and vegetables there is still a wide scope of acceptable foods to choose from.
From your list of what can be consumed you can start to plan meals.
As a vegan I'm often asked 'what do you eat' - I just say 'plants'. I now have a substantial veggie garden so I plan all my meals around what is in season and is in abundance. When there are no tomatoes from the garden I don't buy them. I don't find this restrictive as there is always something in the garden to be incorporated in a meal.
My point is to get away from the idea of 'restriction' as there are a still a vast array of options.
You may find this website with a long recipe list useful;
https://www.all-creatures.org/recipes/index.html