It's the wrong time of year for onions, unless you mean spring onions
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If you like runner beans they really are value for money plants so a good few more of them, sow seeds now, it's not too late
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Peas do not really give much yield for the amount of space they take, something else may be better value
Salad stuff is always good, when you consider the cost of salad bags in the Supermarkets.
A courgette will give a good yield, as will dwarf french beans.
Someone has already mentioned chard, or spinach, and rocket.
a bit of a repeat
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