Seafood Broccoli Rabe Stew

Name: Seafood Broccoli Rabe Stew
Ingredients: 1 Tablespoon extra virgin olive oil; 2 leeks, halved and thinly sliced; 1 bulb fennel, quartered, cored, and thinly sliced; 3 cloves garlic, minced; 2 Tablespoons tomato paste; 1/2 Cup white wine; 4 Cups seafood or vegetable broth; 1 can crushed tomatoes; 1 Cup pitted green olives; 1 Pound shrimp, peeled and deveined; 1 1/2 Pound mussels, scrubbed and debearded; 1 bunch broccoli rabe, trimmed into bite size pieces; 1 Teaspoon salt; 3/4 Teaspoons freshly ground black pepper, plus more for garnish; 4 Tablespoons fresh chopped herbs (such as parsley, cilantro, and mint, or a combination); Zest of one lemon; 6 slices grilled or toasted baguette