Preheat the oven to 300 degrees. Line a large rimmed baking sheet with parchment paper. In a large bowl, toss the tomatoes with the olive oil, honey, thyme leaves, salt, and pepper. Scrape the tomatoes onto the prepared baking sheet and turn them cut side up. Bake the tomatoes for about 1 hour and 25 minutes, until they begin to shrivel and brown. Let cool.

Preheat the broiler. Spread out the baguette slices on a baking sheet. Broil for about 30 seconds on each side, until the edges are golden brown.

Spread the ricotta over the baguette slices and top with the slow-roasted tomatoes. Lightly drizzle the tomatoes with the buckwheat honey, sprinkle with the sliced basil, and serve with additional buckwheat honey on the side.

The roasted tomatoes can be refrigerated for up to 2 days. Bring to room temperature before serving.