Vegetable Tempura

I always love the vegetable tempura from Japanese restaurants and this is the only method of cooking that my kids and I will eat brinjals (together with carrots & cauliflowers). I have tried coating it with egg and flour before frying but the result was not to my satisfactory. I went to supermarket one day and found this tempura batter and Teriyaki Sauce. Though the overall taste not as good as those served in Japanese Restaurants but these were very close. My kids and MIL like this dish very much but I can only allow this fried dish once in a while.