2 tablespoon safflower oil ¼ cup chopped yellow onion ½ cup chopped red bell pepper ¾ cup fresh or frozen (thawed) baby lima beans or edamame 1 cup fresh corn kernels (2 ears) ¼ cup apple cider vinegar 1 tablespoon sugar ½ teaspoon salt ½ teaspoon dry mustard ½ teaspoon black pepper 2 tablespoon chopped fresh dill weed 1 tablespoon chopped green onion