Salads with vinaigrette

500 g pasta , e.g. Penne, Farfalle 4 -6 tomatoes , preferably Roma 1 large cucumber 2 -3 red bell peppers or 2 -3 yellow bell peppers 200 g canned corn 200 g[...]

2 x Idaho baking potatoes , like russets peeled, sliced     into 12 pcs about 1/2"-thk, and     punched out with round cookie cutter 3 sm purple baking[...]