Any Fruit Coffee Cake

Ingredients

• 2 C fruit
• 1 Tbsp lemon juice
• 1/2 C sugar
• 3 Tbsp cornstarch
• 1-1/2 C all purpose flour
• 1/2 C sugar
• 1-1/2 tsp baking powder
• 1/2 tsp ground cinnamon
• 1/8 tsp ground mace
• 1/2 C margarine
• 1 slightly beaten egg
• 1/2 C milk
• 1/2 tsp vanilla
• 1/4 C sugar
• 1/4 C all purpose flour
• 1 Tbsp margarine
• 1/4 C chopped walnuts