In West Texas, we know lots of folks that will eat standard American food and Mexican - they are very averse to vegetables and ethnic foods. Our two kids were raised to eat whatever was placed before them - or they went hungry (or they continued to see the same food as leftovers until they had eaten it). We had some early struggles of will, but they didn't last all that long. We tried to involve the kids in cooking; they washed and cut vegetables, would stir sauces, roll up eggrolls, assembled casseroles, etc.
Both kids now have kids of their own, and they are grateful for how they were raised.