I have found Nasturtiums (Tropaeolum majus) to be very good to eat as well as look at.
We often add the leaves and flowers to our salads.
They are a bit peppery but very crisp and tasty. I'm told they are full of vitamin C and can also be a good relief for colds.
Hey Val, Nasturtium is also a broad spectrum antibiotic and anti-fungal.
It is excellent for treatment of bronchitis, influenza and influenzal pneumonia and is far safer than orthodox antibiotics as it produces no resistance or allergy.
They are well worth having in the garden and will flower over long periods, but just be aware that in some areas they can spread to bushland and become a nuisance plant.
Here's a link to read more about these interesting plants:-
https://www.gardensonline.com.au/GardenShed/PlantFinder/Show_1083.aspx