In a saucepan, heat the olive oil over medium-low heat.
Add in the fennel, onions, carrots, minced garlic and crushed chili pepper.
Sauté for about 6 minutes or just until the fennel and onions are translucent and soft.
Stir often taking care not to burn the garlic.
Add the white wine and stir to deglaze.
Add in the Passata (strained tomatoes).
Fill the bottle from the crushed tomatoes with 2 cups of water and give it a swirl to release any remaining crushed tomatoes from the bottle.
Add this to the tomatoes in the pan.
Stir in the salt, pepper and fresh basil.
Bring to a slow boil, then lower the heat and let the sauce simmer till thickened. About 45 to 50 minutes.
Meanwhile, bring a large pot of water to boil.
When the water has reached a roaring boil, salt the water and toss in the linguine, stirring well.
Cook according to package instructions.
While the pasta is cooking, add the cleaned mussels to the tomato fennel sauce. Cover and let simmer for about 8 minutes. By this time, your pasta should be ready. (Time it so that the linguine and sauce are ready at the same time.)
When the pasta is cooked, drain well and transfer to a serving bowl.
Top the linguine with some of the tomato sauce to coat and transfer onto a serving platter.
Ladle more sauce over the pasta, top with the mussels, and some fresh basil leaves.
You can bring the platter to the table and allow everyone to help themselves. (Very impressive this way). Or you can plate and serve individually.
Serve warm with some crusty bread and a side salad.