Creating Bouillabaisse can be rewarding with these simple steps:

1. Heat Olive Oil: In a large pot, heat olive oil over medium heat.
2. Sauté Aromatics: Add the chopped onion and leeks, cooking until soft and translucent, about 5-7 minutes. Stir in the minced garlic and sauté for another 1-2 minutes.
3. Add Tomatoes: Mix in the diced tomatoes, stirring to combine and cook down for another 5 minutes.
4. Deglaze the Pot: Pour in the white wine, scraping the bottom of the pot to release any browned bits. Allow the wine to reduce by half.
5. Add Stock and Spices: Pour in the fish stock, add saffron, fennel seeds, and the bay leaf. Bring the mixture to a gentle boil, then reduce to a simmer for about 15 minutes. Season with salt and pepper to taste.
6. Add Fish: Gently stir in the white fish chunks, ensuring they are submerged in the broth. Simmer for an additional 5 minutes.
7. Add Shellfish: Add the cleaned shellfish. Cover the pot and cook until the mussels open and the shrimp turns pink, around 5-7 minutes. Discard any mussels that do not open.
8. Adjust Seasoning: Taste the broth and adjust seasoning as needed.
9. Serve: Remove from heat and discard the bay leaf. Ladle Bouillabaisse into bowls, garnishing with fresh parsley.
10. Accompany with Lemon: Serve with lemon wedges on the side for an extra citrusy kick.

These steps will guide you in crafting this incredible French dish with ease.