Preheat oven to 350. Peel outer skin from each garlic head and discard. Cut off on-third of each garlic head. Place garlic, cut side up, in center of a piece of heavy duty aluminum foil. Fold foil over garlic, sealing tightly. Bake 1 hour or until garlic is soft.
Remove from oven and cool for 10 minutes. Remove and discard papery skin from garlic. Squeeze pulp from each clove, or scoop out with spoon; set pulp aside.
Cut peppers in half lengthwise; remove and discard seeds and membranes. Place peppers, skin side up on a large baking sheet; flatten peppers with palm of hand. Broil 5 1/2 inches from heat 15 to 20 minutes or until charred. Place peppers in ice water until cool. Remove from water; peel and discard skins.
Combine garlic, peppers, cottage cheese and remaining ingredients in container of an electric blender; cover and process until smooth, stopping once to scrape down sides. Spoon mixture into a small bowl, cover and chill at least 2 hours.