Here's What You'll Need
chorizo, olive oil, pancetta, red onion, shallot, garlic, anchovy paste, crushed tomatoes, cherry tomatoes, white beans, thyme, bay leaf, chicken stock, pumpernickel breadcrumbs, butter
Preheat oven to 325F. Heat 1 Tbsp oil over medium heat, then add pancetta and cook until crispy on all sides, about 5 minutes. Use a slotted spoon to transfer pancetta to a paper-towel lined plate or bowl.
Add onion and shallot. Cook 2 minutes then add garlic. Cook 1 minute more. Add anchovy paste, use a spoon to break up. Add tomatoes, beans, cooked pancetta, thyme, and bay leaf, then toss gently to combine.
Nestle uncooked chorizo into sauce, then add ½ cup chicken stock.
Combine breadcrumbs with butter, salt, and lemon zest, toss to coat. Sprinkle half on top of chorizo, bake for 1 hour. Sprinkle the rest of the breadcrumbs, then bake an additional hour.