Preheat the oven to 350°F (175°C) and place a rack in the middle position. Line a 9 x 13-inch pan with aluminum foil, letting it hang over the edges, and spray the foil with nonstick cooking spray.
Place the pitted dates, melted butter, packed light brown sugar, honey, almond butter, and salt into a food processor or blender and process until the mixture is smooth and thick.
Transfer the date mixture to a large pot or microwave-safe bowl and bring it to a gentle boil on the stovetop, whisking to combine, or heat in the microwave until bubbling; remove from heat.
While the mixture is still hot, add the rolled oats, crispy rice cereal, flaked coconut, chopped almonds, and dried blueberries. Fold gently with a rubber spatula until the dry ingredients are evenly coated, taking care not to crush the cereal.
Transfer the mixture to the prepared pan and press firmly and evenly into a compact layer using the bottom of a glass or a dry measuring cup.
Bake for 15 to 18 minutes, until the top is golden brown. Remove from the oven and set the pan on a rack to cool completely, about a few hours, until fully set.
Use the foil overhang to lift the block from the pan onto a cutting board and cut into 16 bars with a large chef's knife. Wrap individually or store in an airtight container.