Favorite Strawberry Cake

Name: Favorite Strawberry Cake
Cuisine: World Cuisine
Ingredients: 1 pint fresh strawberries ((1 cup crushed/pureed - instructions below)); 15.25 oz box white cake mix ((can use vanilla or yellow cake mix too)); 3 oz small box of strawberry gelatin (dry) --> reserve 1 tsp for frosting (optional); 4 large eggs; 1 cup vegetable/canola oil; ¼ cup water; ½ cup butter ((1 stick) room temperature); ½ cup natural strawberry preserves; 2 cups powdered sugar