Spicy Summer Kasha Salad

Name: Spicy Summer Kasha Salad
Ingredients: for the salad:; 1 1/2 cups buckwheat groats; 3 cups water; 1 shallot (diced); 1 large handful fresh green beans (trimmed, halved and steamed in salty water); 3 ears sweet corn; 1/2 teaspoon coriander; 1/2 teaspoon turmeric; 1/2 tablespoon cayenne pepper; olive oil; for the vinaigrette:; 1/2 lemon (juice and zest); 1/4- 1/2 cups olive oil; 3 green onions (chopped); 2 tablespoons fresh dill (rough chop); 1 tablespoon Dijon mustard; salt and pepper