I don't know what this dish is called - I made it up one Friday afternoon after discovering that Waitrose have a good offfer at the fish counter on Fridays.
Mix balsamic vinegar, olive oil and tarragon.
Chop or slice fresh peppers and courgettes - not finely - and halve cherry tomatoes. Toss in the dressing.
Put veg mix in a baking tray and roast for 20mins.
Meanwhile toss thin fish fillets, eg trout or similar size, white or oily, in the remaining dressing, and leave to marinade.
After 20mins, take out the tray of veg and toss the veg around a bit. Clear a space in the middle for the fish. Lay a fillet skin-down in the space. Brush with garlic purée, sprinkle with capers (and slivered almonds, if using trout) and fold over. Repeat with the other fillets.
Drizzle or brush the remaining marinade over the fish, and put back in the oven for another 20mins or so.
Really nice served with greens and boiled potatoes.