In a 9x13 baking dish or in a 9x6 oval roasting dish combine the drained and rinsed white beans, shallot, castelvetrano olives, chopped calabrian peppers, ¼ cup of the extra virgin olive oil, the white wine vinegar, sliced lemons, oregano leaves, 1 tsp kosher salt, and ½ tsp black pepper. Toss until well combined.