Pour strawberry lemonade into a large glass bowl and allow it to come to room temperature. Mix in discard, yeast, salt and bread flower until combined. Cover and rest in a warm area for 15 minutes. Wet your hand so the dough doesn’t stick and complete one rotation of “stretch and folds” by shaking and pulling the dough straight up as high as you can get it without breaking and folding it back into the middle. Rotate the bowl ¼ and stretch and fold again until you’ve completed a circle with 4 rounds of stretches and folds.
Allow bowl to sit covered for 15 minutes in a warm area and then complete another round of stretch and folds. Wait at least 15 minutes before starting a third round of stretches and folds and adding strawberry jam. On your third round of stretching and folding add the strawberry jam on the first stretch and fold over it. Continue the ¼ turns, stretching and folding the strawberry jam into the dough. Cover and allow the dough to sit for at least 30 minutes to an hour in a warm area, until doubling in size.
Melt 4 TBS butter and cover the bottom of a 9x13 inch baking dish, turning the pan to ensure it covers both the bottom and sides of the pan. Add dough and spread gently with your fingers until it covers the bottom of the baking dish. Sprinkle cut strawberries on top and push them down gently into the dough. Cover and allow the dough to rise for at least an hour. Before baking push down focaccia with your fingers to dimple and drizzle the final 2 TBS melted butter on top. Bake at 450 degrees for 25 minutes.
In a small bowl, whisk powdered sugar into 2 TBS of strawberry lemonade until desired consistency to drizzle over the top of the bread. Drizzle glaze over bread after it comes out of the oven and is still warm. Cut and serve.