Ingredients

• 4 plum tomatoes, halved lengthwise
• Kosher salt and freshly ground pepper
• Extra-virgin olive oil, for drizzling
• 1/3 cup mayonnaise
• 1 tablespoon horseradish
• 1 cup sliced Savoy cabbage
• 1/4 small red onion, thinly sliced
• 8 slices bacon
• 4 slices seeded rye bread
• 1 tablespoon fresh dill
• 1 teaspoon red wine vinegar

Instructions

1. Preheat the oven to 250 degrees F. Arrange the tomatoes cut-side up on a baking sheet; sprinkle with 1/2 teaspoon salt, and pepper to taste. Drizzle with olive oil. Roast until slightly dry on the surface, about 3 hours, 30 minutes; let cool. (The tomatoes can be roasted up to one day ahead; refrigerate in an airtight container.)
2. Whisk the mayonnaise, horseradish, and pepper to taste; cover and refrigerate.
3. Toss the cabbage, red onion, a splash of water and 1/2 teaspoon salt in a colander set over a bowl; let drain until the cabbage softens, about 20 minutes. Rinse well with cold water, squeeze out the excess liquid and pat dry.
4. Meanwhile, cook the bacon in a large skillet over medium-high heat until crisp; reserve the drippings.
5. Toast the bread. Toss the cabbage mixture with the dill, 1 teaspoon of the bacon drippings, the vinegar, and pepper to taste in a bowl. Top each piece of toast with some of the horseradish mayonnaise, 2 slices of bacon, 2 roasted tomato halves and some of the cabbage mixture. Drizzle with more drippings.
6. Photograph by Jonathan Kantor