Pasta with Summer Vegetables and Spicy Peanut Sauce

for the sauce: 3/4 cups smooth peanut butter

3 tablespoons soy sauce

2 tablespoons rice vinegar or white wine vinegar

1 tablespoon lime juice

1 small garlic clove -- minced

cayenne pepper to taste 1/2 cup hot water

12 ounces pasta -- i.e. rotelle,

-- penne, farfelle 2 carrots -- cut into thin

-- slices on a -- diagonal 1 1/2 cup broccoli florets

1/2 pound snow peas -- trimmed and cut

-- crosswise into -- 1-inch pieces 4 scallions -- thinly sliced

In a small saucepan combine the peanut butter, soy