Not far from Disney, go to Ma's Islamic. Food from the northwest of China. You MUST ORDER the thick sesame bread. Worth a trip across the country. I still dream about it. Long menu, I am sure you will find other thigns to order.
Also near Disney: Orange County is home to the largest Vietnamese community in the US, and they have many great places to eat. One dish that the places are especially serious (and competitive!) about is cha ca thang long, turmeric catfish. Song Long in Westminster is a very good place to try this dish.
There is also a Cambodian enclave in Long Beach with about a dozen Cambodian places. Koh Ruessei (Bamboo Island) features anchovy beef, which comes in two parts: an enormous pile of the best sliced steak you could dream of along a salad of thai eggplant and cherry tomatoes in an anchovy dressing.
Bon ap!