White Bean Ragout with Toast

INGREDIENTS

• 2 tablespoons chopped flat-leaf parsley
• 1/2 cup extra-virgin olive oil plus more
• freshly ground pepper
• 4 cups vegetable broth, divided
• 4 garlic cloves, 3 finely grated, 1 halved
• Kosher salt
• 1 red bell pepper, chopped
• 4-6 1"-thick slices grilled or toasted ciabatta
• 2 teaspoons tomato paste
• 2 15-ounce cans cannellini (white kidney) beans, rinsed and drained
• 1 cup cherry tomatoes, halved
• 8-10 tablespoons finely grated Parmesan, divided
• 3 medium onions, chopped