Start by cooking 4 cups of pasta according to the package directions. Drain pasta and let it cool. Then chop up 1 green pepper, 1 yellow or red onion, and 2 tomatoes. When the pasta is cool mix it together with the chopped vegetables. Next make the dressing by mixing 1 (14 oz.) can of condensed milk with 3 tablespoons of vinegar, 1 cup of sugar, 2 cups of mayonnaise, 1 teaspoon of salt, and 1/2 teaspoon of pepper. Add the dressing to the pasta and vegetables and mix thoroughly. Chill at least 4 hours before serving.