Preheat oven to 350° F. Line a 9-inch square baking pan with parchment paper or greased foil.
In a large bowl combine the oats, flour, whole wheat flour, brown sugar, baking soda, salt, cinnamon and lemon zest.
In the bowl of a stand mixer fitted with a paddle attachment, or in a large bowl with a hand-held mixer, beat the cream cheese and butter together until creamy. Add the oat mixture and mix just until it forms a crumbly dough.
Reserve 1 cup of the dough for the topping and set aside. Press remaining dough into the prepared pan. Bake until set and just appears to turn brown, about 15 minutes.
Combine jam and lemon juice and spread on top of the hot crust. Scatter remaining dough on top of jam. Bake until topping is golden, about 15-20 minutes more. Let cool completely, then slice into bars.
Calories: 174kcal, Carbohydrates: 26g, Protein: 2g, Fat: 7g, Saturated Fat: 4g, Cholesterol: 19mg, Sodium: 95mg, Potassium: 71mg, Fiber: 1g, Sugar: 13g, Vitamin A: 231IU, Vitamin C: 2mg, Calcium: 23mg, Iron: 1mg