1 15.5-oz. can cannellini beans, drained and rinsed
1 15.5-oz. can butter beans, drained and rinsed
1 15.5-oz. can navy beans, drained and rinsed
2 leeks, sliced into 1/2-in. pieces
1 large onion, chopped
2 red bell peppers, seeded and cut into 1-in. pieces
4 medium carrots, sliced into 1/2-in. thick coins
2 c. celery, sliced into 1-in. pieces
2 12-oz. packages fully-cooked, Cajun-style Andouille sausage, sliced into 1-in. pieces
2 cloves garlic, minced
1 tsp. salt, or to taste
1/2 tsp. freshly ground black pepper
1 tsp. fresh thyme leaves, chopped
1 bay leaf
3 c. chicken stock
2 c. kale, chopped