Here's a really easy recipe for Vegetable Tempura......
1 cup flour (I like wholemeal but you can use white)
1/4 tsp salt
1 beaten egg (medium)
1 cup ice cold milk
Mix the flour and salt and slowly stir in the egg and milk and beat with a wooden spoon until the mix is smooth. If you are not going to use the batter straight away, cover it and pop it in the fridge - it needs to be really cold.
Wash and dry your (also cold) vegetables - chopping them up if need be (you want bite size pieces). Dip them in a little dry flour then dip into the batter mix and deep fry until golden brown, then drain on kitchen paper and serve up on a bed of shredded lettuce, with some dipping soy sauce.
I often add some smoked paprika or chilli powder to the batter for an *interesting* added flavour. The vegetables I like to use are:- button mushrooms (whole), cauliflower florets, broccoli florets, onion rings, spoonfuls of sweetcorn, chunks of red or yellow peppers and just to really confuse the diners, pineapple chunks (these need to be really well dried out for the batter to stick to them) and thick slices of cooked potato.... Everyone gets a bowl of mixed tempura so the pineapple is a fun addition.