Slice off the tops of 4 large beefsteak tomatoes; scoop out the seeds and some of the flesh. Drizzle with olive oil; season with salt and pepper. Fill each tomato with 1 ounce crumbled goat cheese. Combine 1/2 cup panko, 2 tablespoons each olive oil, grated Parmesan and chopped parsley, 1 grated garlic clove, 1 teaspoon each fresh thyme and grated lemon zest and 1/2 teaspoon kosher salt; sprinkle on the tomatoes. Bake at 450˚ F until golden brown, about 10 minutes.