Everything Bagel Tomato Panzanella

Ingredients

• ½ cup full-fat sour cream
• Zest and juice of 2 lemons (about¼ cup juice)
• 2 tablespoons everything bagel spice blend, plus more for serving
• ½ teaspoons kosher salt, plus more to taste
• 2 cups cherry tomatoes, halved
• 1 large fennel bulb, stalks removed, bulb thinly sliced
• 1 small red onion, thinly sliced
• 2 tablespoons extra-virgin olive oil
• 3 cups roughly torn sourdough bread
• ½ cup coarsely chopped fresh dill