1/4 pound bacon, slices cut crosswise into 1/2-inch strips
2 carrots, cut into 1-inch pieces
2 onions, cut into 1-inch chunks
2 ribs celery, cut into 1-inch pieces
1/2 pound mushrooms, sliced
6 cloves garlic, peeled
1 pound lentils (about 2 1/3 cups)
1 1/2 quarts canned low-sodium chicken broth or homemade stock
3 cups water
1 teaspoon dried rosemary, or 1 tablespoon chopped fresh rosemary
1 cup canned tomatoes in thick puree, chopped
2 teaspoons salt
1/4 teaspoon dried red-pepper flakes
1/4 teaspoon fresh-ground black pepper
1/2 cup tubetti or other small macaroni