Any-Fruit Coffee Cake

Ingredients

• 4 c. chopped apples, apricots, peaches, pineapple, blueberries or raspberries
• 1 c. water
• 2 Tbsp. lemon juice
• 1 1/4 c. sugar
• 1/3 c. cornstarch
• 3 c. all-purpose flour
• 1 c. sugar
• 1 Tbsp. baking powder
• 1 tsp. ground cinnamon
• 1/4 tsp. ground mace
• 1 tsp. salt
• 1 c. butter or margarine
• 2 slightly beaten eggs
• 1 c. milk
• 1 tsp. vanilla
• 1/2 c. sugar
• 1/2 c. all-purpose flour
• 1/4 c. butter or margarine
• 1/2 c. chopped walnuts