Spanish onion 
noun
A large onion with a mild flavour.The melt-in-your-mouth morsels are served with Spanish onions, red peppers and capers, creating one of those memorable dishes that demand a return visit....
- Dice mango, kiwi fruit, avocado, Spanish onion and red capsicum in a mixing bowl and add coriander and season to taste.
- The generous portion came in a mass of chunks and tentacles, mixed with sliced Spanish onion, lemon and capers, barely warm and expertly cooked.
- be tuned in
- between
- between a rock and a hard place
- between jobs
- between ourselves (or you and me)
- between the devil and the deep blue sea
- between you and me and the bedpost (or the gatepost or the wall)
- between you and me and the gatepost
- between you and me and the wall
- be twice the man/woman (that someone is)
- betwixt
- betwixt and between
- be two a penny
- be two (or ten) a penny
- beun
- be unable to believe one's eyes (or ears)
- be unable to hear oneself think
- be unable to (or be hardly able to) believe one's luck
- be unable to punch one's way out of a paper bag
- be unable to see the wood (or the forest) for the trees
- be under no illusion (or illusions)
- be under the illusion that
- be up shit creek
- be up shit creek (also be up shit creek without a paddle)
- be up the creek