You can use almost any fruit you want: peaches, blueberries, strawberries, blackberries, plums or nectarines fresh or frozen. Adjust the flavor of the preserves to go with the fruit or combine different flavors for a little zip to this dessert.
Preheat oven to 350°F (175°C). Lightly oil a 9”×9” baking pan or dish. Place fresh fruit or berries in a medium bowl. Combine preserves, cinnamon, and lemon juice. Pour mixture over fruit and gently toss trying not to mash fruit. Sprinkle flour and ¼ cup brown sugar over mixture and toss. Spread fruit mixture evenly in the bottom of a baking dish. In a large mixing bowl, combine oats, sugar or maple syrup and vegan butter. Crumble the oat mixture and nuts over top of the fruit. Place pan in oven and bake until light golden brown in color (about 20-25 minutes). Remove and serve warm or room temperature.