Plum-Berry Crumble

Ingredients

• 1 pound plums, pits removed and cut into eighths (about 5 plums)
• 1 quart strawberries, quartered (about 3 cups)
• 1 cup blueberries
• 1/4 cup packed brown sugar
• 2 tablespoons lemon juice
• 1 teaspoon vanilla extract
• Cooking spray
• 1 cup regular oats
• 3/4 cup all-purpose flour
• 1 teaspoon ground cinnamon
• 1/4 teaspoon salt
• 6 tablespoons chilled butter, cut into small pieces
• 1/2 cup turbinado sugar