5 ears corn, husks on but silks removed
4 green onions, roots and tops trimmed
2 cups quinoa, well rinsed
3 1/4 cups water
salt
4 plum tomatoes, cored, seeded, and diced
1 cup lightly packed cilantro leaves and tender stems, chopped
juice of 3 limes (about 1/4 cup)
2 tablespoons olive oil
black pepper