In saucepan or large pan pour pre-cut onions, red onions and green onions. Pour a little olive oil and a little water (maybe mushroom broth instead of water). Once the onion is saute, add cleaned and sliced ​​mushrooms and corn. Pour with soy sauce and add the garlic. Leave some time to simmer with a lid to smother all vegetables. Optional can top up more liquid. Serve as a complement to meat or even as a main dish. Much goes with white wine or samotok.