Mushroom-and-Bacon Dip

INGREDIENTS

• 3 dried porcini mushrooms
• 1/2 cup boiling water
• 8 slices thick-cut bacon
• 1 large or 2 small leeks, white and pale-green parts only, halved lengthwise, thinly sliced crosswise, and washed well
• 4 garlic cloves, finely chopped
• 1 pound cremini, white, or shiitake mushrooms, cleaned and chopped, plus sliced mushrooms for garnish (optional)
• 1 teaspoon coarse salt
• 1/4 teaspoon freshly ground pepper
• 1 1/2 teaspoons finely chopped fresh thyme
• 1 package (8 ounces) cream cheese, softened
• 2 cups sour cream (16 ounces)
• 3 tablespoons sliced scallions (dark-green parts only), plus more for garnish
• , for serving (optional) Waffle Chips