3 ounces pancetta, diced
5 slices thick-cut bacon, diced
1 small onion, finely chopped
1 tablespoon minced peeled ginger
2 cloves garlic, minced
2 1/2 teaspoons chili powder
1 15-ounce can whole tomatoes, crushed by hand
3 tablespoons molasses
1 tablespoon Worcestershire sauce
1 tablespoon apple cider vinegar
1 teaspoon mustard powder
Kosher salt and freshly ground pepper
2 15-ounce cans pinto beans, drained and rinsed
1 15-ounce can navy beans, undrained
2 hamburger buns or 3 slices white sandwich bread, torn into pieces