In a food processor, combine beans, olive oil and water and process until smooth. If the dip is too thick, add a little more water a teaspoon at a time until you reach your desired consistency.
In a small mixing bowl, combine sundried tomatoes, sage, lemon juice and zest. Stir in beans and season with salt and pepper.
Transfer the dip to a serving bowl. For the best flavour, consider chilling for 30 minutes to allow the flavours to meld. Garnish with an extra drizzle of olive oil before serving. Serve with crostini, Parmesan crackers, pita chips or fresh vegetables.