Pasta, Tomato and Snow Pea Salad

8 ounces fresh snow peas or sugar snap peas -- trimmed
12 ounces pasta shells
1/4 cup red wine vinegar
1 teaspoon salt
freshly ground black pepper -- to taste
1/3 cup olive oil
3 tomatoes -- cut in bite size chunks

Bring a large pot of water to a boil. Have a bowl of ice water ready.
Put peas in a long handled strainer and immerse in the boiling water 10 to 15 seconds until their color brightens. Plunge into ice water; drain when cold.
Add pasta to boiling water; cook as directed on package. Drain in a colander; cool under running cold water.
Meanwhile whisk vinegar, salt and pepper in a large serving bowl. Slowly whisk in oil until blended. Add pasta and tomatoes; toss gently to coat.
Marinate at least 15 minutes, tossing occasionally. Serve within 1 hour or refrigerate. Just before serving, add peas and toss to mix.