Brush asparagus with olive oil, sprinkle with salt and grill over medium-hot heat, turning frequently until browned, hot and tender-crisp, 4 to 6 minutes depending on size. Cool. In a food processor, puree roasted red bell pepper and next 8 ingredients. With machine running, drizzle in 1 1/2 Tbs. of olive oil. If necessary, thin with 1 Tbs. of water at a time until a thick, sauce-like consistency is achieved.