For a truck version, no oven and no freezer needed. Blend a tub of plain Greek yogurt (or cottage cheese) with a scoop of protein powder, the zest and juice of a lemon, and a little sweetener, then let it set in a cup in the fridge overnight. It will not slice like a baked one but it eats like one. The carbs stack up in the crust and the sweetener, so go light or skip the crust, and put the blueberries on the morning you eat it. Holds 3-4 days in a truck fridge.