Scrape pulp from tomatoes. Drain tomatoes on paper
towel. In a medium saucepan, heat 1/2 teaspoon oil over medium
heat. Add leek, cook until tender, about 5 minutes, stir
often. Add zucchini and saute until crisp-tender, 5 minutes.
Sprinkle with cayenne and mix well. Arrange around heated
serving platter. Cover to keep warm. Add remaining 1/2
teaspoon oil to pan. Heat on medium-high and add tomatoes.
Toss until just heated through, 2 minutes. Arrange tomatoes in
center of serving platter, surrounded by zucchini. Serve
immediately.