Cheesy Tomato Beans With Broccoli Rabe

Ingredients

• 4 garlic cloves
• 3 tbsp. extra-virgin olive oil, plus more for serving
• 2 tbsp. double-concentrated tomato paste
• ½ tsp. crushed red pepper flakes, plus more for serving
• 1 bunch broccoli rabe, trimmed, cut into 3" pieces
• kosher salt, freshly ground pepper
• 1 14-oz. can whole peeled tomatoes, drained, tomatoes torn into pieces, liquid reserved
• 2 15-oz. cans cannellini (white kidney) or other white beans, rinsed
• 1 cup shredded low-moisture mozzarella
• finely grated parmesan and toasted country-style bread (for serving)