To food processor, add sprouted rolled oats and pulse 5 to 6 times, until oats are halved in size. Add Medjool dates, 1 cup chopped walnuts, coconut, chia seeds, coconut oil, maple syrup, and sea salt, and pulse, then process until all ingredients are mixed well to form a sticky base mixture. In prepared baking dish, spread mixture and press firmly to create an even and uniform bar base. Refrigerate, uncovered, while making the ganache.