Step 1: Prepare the Crostini

1. Preheat the oven to 375°F (190°C).
2. Arrange the baguette slices on a baking sheet and brush both sides with olive oil.
3. Sprinkle with salt and pepper.
4. Bake for 10-12 minutes, flipping halfway, until the bread is golden and crispy.
5. Remove from the oven and let cool on a wire rack.

Step 2: Roast the Sweet Potatoes

1. Increase the oven temperature to 400°F (200°C).
2. In a mixing bowl, toss the diced sweet potatoes with olive oil, maple syrup, salt, pepper, and ground cinnamon.
3. Spread the sweet potatoes in an even layer on a baking sheet lined with parchment paper.
4. Roast for 20-25 minutes, stirring halfway through, until the sweet potatoes are tender and caramelized.
5. Set aside to cool slightly.

Step 3: Prepare the Maple Walnut Topping

1. In a small skillet over medium heat, melt the butter.
2. Add the chopped walnuts and toast them for 2-3 minutes, stirring constantly.
3. Pour in the maple syrup and cook for an additional 2-3 minutes until the walnuts are caramelized.
4. Sprinkle with a pinch of sea salt and transfer to a plate to cool.

Step 4: Assemble the Crostini

1. Take the cooled crostini and spread a piece of burrata cheese on each slice.
2. Top with a spoonful of roasted sweet potatoes.
3. Add a sprinkle of the maple-glazed walnuts over the sweet potatoes.

Step 5: Garnish and Serve

1. Garnish the crostini with fresh thyme leaves.
2. Optionally, drizzle a bit of honey on top for added sweetness.
3. Serve immediately and enjoy!