# What You’ll Need:
→ Fruit Filling
01 - 4 cups fresh or frozen blueberries
02 - 1 tablespoon finely grated lemon zest
03 - 2 tablespoons fresh lemon juice
04 - 1/3 cup granulated sugar
05 - 2 tablespoons cornstarch
06 - 1/8 teaspoon salt
→ Crisp Topping
07 - 3/4 cup old-fashioned rolled oats
08 - 1/2 cup all-purpose flour
09 - 1/2 cup packed light brown sugar
10 - 1/3 cup cold unsalted butter, diced
11 - 1/4 teaspoon ground cinnamon
12 - 1/4 teaspoon salt
# Step-by-Step Guide:
01 - Preheat the oven to 350°F (175°C).
02 - In a large bowl, combine blueberries, lemon zest, lemon juice, granulated sugar, cornstarch, and salt. Toss gently until berries are evenly coated.
03 - Place the fruit mixture into a lightly greased 8-inch square baking dish.
04 - In a separate bowl, mix oats, flour, brown sugar, cinnamon, and salt. Add cold diced butter and work it into dry ingredients using fingers or pastry cutter until coarse crumbs form.
05 - Evenly sprinkle the crisp topping over the fruit filling. Bake for 35 to 40 minutes until topping is golden and filling is bubbly.
06 - Allow the dessert to cool for at least 10 minutes before serving warm. Optionally serve with vanilla ice cream or whipped cream.