Mushrooms
Marmite
Leeks
Onions
Cauliflower
Pesto
Peppers
Tomatoes
Peanut butter
Broccoli
Lettuce
Lamb
Pork mince
Fish
Eggs
Peaches
Cucumber
Beef mince
Beef
Sandwich meat such as ham.
With a list this long, its hard to imagine what some fussy eaters actually eat!