Favorite Strawberry Cake

Name: Favorite Strawberry Cake
Cuisine: World Cuisine
Ingredients: 1 pint fresh strawberries (1 cup crushed/pureed - instructions below); 1 box white cake mix (can use vanilla or yellow cake mix too); 1 (3oz) small box of strawberry gelatin (dry) --> reserve 1 tsp for frosting, optional; 4 large eggs; 1 cup vegetable/canola oil; 1/4 cup water; 1/2 cup (1 stick) butter, room temperature; 1/2 cup natural strawberry preserves; 2 cups powdered sugar