Japanese Soba (buckwheat) Noodle salad

200 g Japanese Soba noodles (cook according to the directions)
1/4 cup soy sauce
1/4 cup rice vinegar or white vinegar
2 - 3 TBSP brown sugar
1 tsp sesame oil from Japan (found in Asian section - it has more aroma than regular sesame oil)
1 TBSP sesame seeds
4 - 5 cups organic spring salad from Costco
2 medium size tomatoes - diced
3 (about half bunch) green onions - chopped
6 Japanese Shiso leaves -finely chopped (optional)
sesame seeds to sprinkle

Cook the Soba noodles, wash with cold water, drain.

Mix soy sauce, vinegar, sugar, sesame oil and sesame seeds, and set aside

Mix Soba noodles and vegetables, and add the dressing and toss right before you eat.