Barramundi with braised green beans, dill and mint

Name: Barramundi with braised green beans, dill and mint
Cuisine: European
Ingredients: 1 tbsp olive oil; 4 skinless barramundi fillets (200gm each); 50 ml extra-virgin olive oil; 1 garlic clove, thinly sliced; ½ cup each mint and dill, coarsely chopped; 2 tbsp olive oil; 1 onion, thinly sliced; 1 baby fennel bulb, thinly sliced, fronds reserved; 1 garlic clove, finely chopped; 300 gm green beans, trimmed and thinly sliced; 400 gm canned chopped tomatoes; 100 ml dry white wine; 1/4 cup each (firmly packed) dill and flat-leaf parsley, finely chopped; Juice of 1 lemon, or to taste