Cheesy Pizza Fondue

1 jar (29 ounces) meatless spaghetti sauce
2 cups (8 ounces) shredded mozzarella cheese
1/4 cup shredded parmesan cheese
2 teaspoons dried oregano
1 teaspoon dried minced onion
1/4 teaspoon garlic powder
1 unsliced loaf (1 pound) Italian bread, cut into cubes

In a 1-1/2-qt. slow cooker, combine the spaghetti sauce, cheeses, oregano, onion and garlic powder. Cook for 4-6 hours or until cheese is melted and sauce is hot. Serve with bread cubes. Makes 12 servings (4 cups).