Seafood Pasta With Tomato and Crushed Olives

or another tube-shaped pasta

plus more for drizzling

sliced

optional

can, whole, crushed by hand

or clams, optional

firm-fleshed, such as cod, halibut, swordfish, hake or flounder, cut into 2-inch pieces

peeled and deveined if you like

or other green, pitted and crushed

tender leaves and stems, chopped