Tuxedo Strawberry Cake

Name: Tuxedo Strawberry Cake
Ingredients: Ground Flax Seeds 4 tablespoons (32g); Hot Water 10 tablespoons (150ml); Soy Milk 1 cup (237ml); Vanilla Extract 2 teaspoon (10ml); All Purpose Flour 2½ cup (325g); Granulated Sugar 1½ cup (300g); Baking Powder 4 teaspoons (20g); Salt 1 teaspoon (6g); Vegan Butter 12 Tablespoons (175g); For the Custard:; Soy Milk 3 cups (709ml); Granulated Sugar ½ cup + 2 Tbs (125g); Cornstarch 6 Tablespoons (60g); Vanilla Extract 2 teaspoons (10ml); Tumeric *for color ⅛ - ¼ teaspoon *I used ¼ and thought it was a bit intense; Vegan Butter 1 tablespoon (14g); For the Ganache:; 12 ounces vegan chocolate semi sweet; 12 ounces soy milk; For the Buttercream:; Vegan Butter 1½ Cups (3 sticks) (336g); Solid Vegetable Shortening 1½ Cups (336g); Confectioners Sugar 6 cups (720g); Vanilla Extract 2 teaspoons; Salt ¼ teaspoon *optional- I use Earth Balance butter so it is already salted and I leave it out to avoid an overly salty buttercream; Vegan White Chocolate 12 ounces; Fresh Strawberries 2 lbs