Pasta Salad without parmigiano beans

1 1/2 cups penne pasta 1/4 cup olive oil 2 tablespoons finely chopped red onion 2 tablespoons red wine vinegar 2 teaspoons whole-grain mustard 1/2 teaspoon[...]

9 ounces dry pasta , twists 4 eggs , hard-boiled, peeled, chopped 2 sticks celery , finely chopped 1 small red pepper, finely chopped 4 green onions , chopped[...]