Indian-born cooking instructor Suneeta Vaswani has won Houstonians’ hearts with her authentic native cuisine. Her buffet for twelve can be made ahead and served at room temperature. Shrimp pulao and a spicy spinach sauté contrast nicely with a crunchy four-bean-and-potato salad and a cool cucumber-peanut relish. Mango lassis are sure to quench summer thirsts. Coconut sweet is a tropical finish.