Step 1

Preheat oven to 350 degrees. Bring a pot of water to a boil. Fill a large mixing bowl with ice water. Carefully drop peaches in boiling water and allow to boil 30 seconds - 1 minute, just until their skin easily peels off.

Step 2

Immediately transfer peaches to cold water. Peel peaches and slice into chunks or wedges.

Step 3

Place diced peaches in a large mixing bowl along with lemon zest, lemon juice, 1/2 cup granulated sugar, 1/4 cup flour and pinch of salt.

Step 4

Toss mixture to evenly coat. Fold in blueberries and pour mixture into an 8 by 8-inch baking dish and allow to rest 5 minutes while preparing topping.

Step 5

To prepare the topping:

Step 6

In a food processor, combine 1 cup flour, 1/3 cup granulated sugar, brown sugar, salt, cinnamon, butter, and vanilla, and pulse mixture just until it appears moist.

Step 7

Press mixture into crumbles with your fingertips and sprinkle evenly over top of peach mixture.

Step 8

Bake in preheated oven 45 - 50 minutes, until tops are nicely browned. Serve warm with vanilla bean ice cream if desired.