Tomato-Poached Fish With Chile Oil and Herbs

INGREDIENTS

1/4 cup

olive oil, plus more for drizzling

garlic cloves, thinly sliced

small shallot, thinly sliced into rings

1 tsp

red-pepper flakes

1 lb

small, sweet tomatoes, halved

Kosher salt and black pepper

1 tsp

fish sauce (optional)

1 1/4 lb

fluke, halibut or cod, cut into 4 equal pieces

1 cup

cilantro, tender leaves and stems

1/2 cup

mint, tender leaves and stems

Limes, halved, for serving

Tortillas, toast or rice, for serving (optional)