Crostini: In bowl, toss together bread, oil and pepper; spread on rimmed baking sheet. Bake in 400 oven, tossing once until golden and crisp, 6 - 8 minutes. (Can make ahead).
Cook pasta before adding to soup.
Soup: Saute onion, celery, carrots, garlic, bay leaves, salt and pepper for about 5 - 8 minutes or until cooked. Scrape into slow cooker.
Stir in tomato paste, ham hock, parmesan rind, potato, red and white beans and water. Cover and cook on low for 6 - 8 hours or until ham can be pulled off bone easily. Discard bay leaves and Paremesan rind.
Increase heat to high. Stir in red pepper and zucchini; cook, covered for 20 minutes.