Preheat oven to 350 degrees F. Place all the ingredients in a food processor and blend until smooth. (If using a blender instead of a food processor, stop the machine frequently and scrape down the sides of the container with a rubber spatula. First be sure the blades have stopped completely. Blend just until mixture is smooth.) Coat a 1-1/2 quart baking dish with a nonstick vegetable spray and pour in mixture. Bake for 30 minutes, until lightly browned. Serve on party rye bread. Note: You can also bake this spread in several small baking dishes. After they cool, cover each one with plastic wrap and freeze them for later use. When ready to use, thaw, then remove plastic wrap, and rewarm in the oven or microwave.