2 tablespoons cooking oil
1/4 pound mild or hot sausages, casings removed
2 onions, chopped
3 cloves garlic, minced
1 pound kale, tough stems removed, leaves washed well and shredded (about 1 1/2 quarts)
3 1/3 cups canned diced tomatoes with their juice (two 15-ounce cans)
1 1/4 teaspoons salt
1/2 teaspoon fresh-ground black pepper
4 cups drained and rinsed canned cannellini beans (two 19-ounce cans)