swordfish steaks 3/4” thick (8-10 oz. each) • olive oil, divided • salt, pepper, and thyme • fennel bulb, chopped • medium onion, sliced, 2” pieces • garlic clove, peeled and smashed • chopped tomatoes, juices drained • black pitted olives, drained, halved • capers, drained (optional) • tarragon, coriander, & oregano • fresh basil leaves, cut or snipped into thin threads