1. Bring 2 large pots of salted water to a boil. Prepare a large bowl of ice and cold water. In one pot, boil green beans 3 minutes; drain and plunge in ice water to stop cooking. In the other, cook pasta until tender to the bite, 9 to 12 minutes or according to package directions. Drain and rinse thoroughly under cold water until completely cool (see Notes).
2. In a food processor, pulse mayonnaise, Roquefort, and vinegar until well combined but still slightly chunky.
3. In a large bowl, toss together pasta, green beans, Roquefort dressing, parsley, chives, bacon, and pepper until pasta is well coated. Season with salt to taste.
Note: Nutritional analysis is per 1-cup serving.
Ingredients can be prepped and pasta cooked a day ahead of time and chilled (add 1 tbsp. extra-virgin olive oil to the cooked pasta). Toss everything together just before serving. The dressing can be made ahead too; if it thickens, thin it with a little more vinegar or even milk.