Tuna-Pasta Salad In Tomato Cups
["6 medium size tomatoes", "1/2 c. plain low-fat yogurt", "2 Tbsp. Dijon mustard", "1 Tbsp. mayo", "1 Tbsp. vinegar", "1/8 tsp. black pepper", "1 uncooked medium sized whole wheat pasta (such as shells, elbows), cooked without salt and drain", "1/2 c. frozen green peas, thawed", "3/4 c. diagonally sliced carrots", "1/4 c. each chopped celery and cucumber", "1/4 c. thinly sliced radishes", "1 Tbsp. finely chopped onions", "1 (7 oz.) can water packed tuna, drained and flaked", "curly lettuce leaves", "unsalted crackers or sesame bread sticks"]
["With a sharp knife, cut off and reserve a thick slice from the blossom end of each tomato.", "Scoop out tomato pulp and seeds. Leave tomato, cut side down, on paper to dry for 5 minutes. Coarsely chop tomato pulp."]
["tomatoes", "yogurt", "mustard", "mayo", "vinegar", "black pepper", "whole wheat pasta", "frozen green peas", "carrots", "celery", "radishes", "onions", "water", "curly lettuce", "unsalted crackers"]