Strawberry Streusel Coffee Cake
["2 c. biscuit baking mix", "2 Tbsp. granulated sugar", "1 egg", "2/3 c. plus 1 Tbsp. milk", "1/2 c. chopped nuts", "1/4 c. firmly packed light brown sugar", "1/4 tsp. ground cinnamon", "1/2 c. Bama", "strawberry, cherry or red raspberry preserves", "3/4 c. confectioners sugar", "1/2 tsp. vanilla extract"]
["Preheat oven to 400\u00b0 (375\u00b0 for glass dish)."]
["biscuit baking mix", "sugar", "egg", "milk", "nuts", "brown sugar", "ground cinnamon", "strawberry", "confectioners sugar", "vanilla extract"]