Sour Cream Cherry Coffee Cake

• 2 eggs
• 1 lemon zest
• 1/2 best quality cherry preserve
• 250 gr all purpose flour
• 240 ml fat-free sour cream
• 200 gr granulated sugar
• 5 gr baking powder
• 5 gr baking soda
• 4 gr pure vanilla extract
• 1 gr salt