Heat the oven to 450°F. Spread the tomato slices on a large plate and season with 1/4 tsp. salt and a few grinds of black pepper. Heat a large sauté pan over medium heat for 1 minute. Pour in the olive oil, add the breadcrumbs, and season with 1/4 tsp. salt. Cook, stirring, until the breadcrumbs start to turn a light golden brown, about 4 minutes. Add the garlic and continue to cook, stirring, for another 1 minute. Transfer to a bowl.
Set the fish on a large rimmed baking sheet lined with foil. Season with salt and pepper. Divide the pesto evenly over the fish and top each with two or three tomato slices and the breadcrumbs. Roast until the fish is opaque on the sides and starts to flake, about 10 minutes. Serve immediately.
nutrition information (per serving):
based on four servings;
Photo: Scott Phillips