Preheat your oven to 350°F (190°C). In a large bowl, toss the strawberries with ⅓ cup of sugar and lemon juice. Let sit while you prepare the topping.
In a bowl, whisk together dry ingredients: all purpose flour (or milled wheat--see tips), remaining sugar, baking powder, and salt.
Add sourdough discard, milk, and vanilla to the flour mixture. Stir until combined.
Add melted butter to the mixture. Stir until combined making sure not to overmix.
Pour the cobbler dough into the prepared 13 X 9" baking dish. Spoon the strawberries out of the bowl and place them on top of the cobbler dough, discarding any extra liquid left behind.
Bake for 50 minutes, or until the topping is golden brown and a toothpick inserted into the batter comes out clean.
Let cool slightly, then serve warm with whipped cream or a scoop of ice cream!