1. Remove white papery skin from whole garlic heads (do not peel or separate the cloves). Wrap each head separately in foil. Bake at 350° for 1 hour; cool 10 minutes. Separate cloves; squeeze to extract garlic pulp. Discard skins.
2. Place garlic pulp, Traditional Hummus, and cannellini beans in a food processor; pulse 5 times or until chopped. Add 1/4 cup water; process until smooth, scraping down sides as needed. Stir in chopped fresh rosemary.