Chiffon cake with strawberries and cream

Ingredients

• 2 1/4 cups all-purpose flour
• 2 cups sugar
• 2 1/2 tsp baking powder
• 1/2 tsp salt
• 1/2 cup safflower oil
• 7 egg yolks
• 9 egg whites
• 3/4 cup milk
• 1/2 tsp cream of tartar
• 1 vanilla bean (seeds)
• 2 lbs strawberries
• 1 tbsp lemon juice
• 2 cups heavy cream (cold)
• 1/4 cup confectioners’ sugar
• 3/4 tsp salt
• confectioners’ sugar for serving
• fresh berries for serving