Cut beef into 2-3 pieces. Blanch the beef very briefly in boiling water, transfer to a bowl of cold water immediately, drain, and pat dry. Soak wakame seaweed in water, wring, and cut into 1-inch strips. Julienne cucumber, daikon radish, carrot, and Japanese leek into 1-inch pieces, and combine. Soak in ice water to crisp, and drain. Cut tomatoes into quarters. To make sesame dressing, grind toasted white sesame seeds in a mortar, add seasonings, and mix well. Spread sliced vegetables on plates, arrange wakame and beef on top, and garnish with tomatoes. Serve with sesame dressing on the side. 

Note: 
Sesame Dressing is on the market instead of making. Herb, lettuce, onion or so on can also be used instead of these vegetables. 14 oz beef sirloin, thinly sliced1/6 oz dried wakame seaweed, 1/2(2oz) cucumber, 1 3/4 oz carrot, 3+1/2 oz daikon radish, 1-inch Japanese leek, 4 cherry tomatoes.

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Sesame Dressing:
6 Tbsp toasted white sesame seeds
1 Tbsp sugar
1 Tbsp mirin
5 Tbsp soy sauce
7 Tbsp rice vinegar
3 1/3 oz dashi (basic stock)

*** For Details about Ingredients , check your nearest Japanese Store.