3 garlicky fish stew from corfu Recipes

butter, unsalted, extra virgin olive oil, onions, halved and thinly sliced, garlic cloves, chopped, dry white wine, potatoes , scrubbed, peeled and sliced (i prefer yukon gold), salt & freshly ground black pepper, fish fillets, fresh (white , firm fleshed fish like cod), lemon, halved, fresh flat-leaf parsley, chopped, lemon wedge (to garnish )

unsalted butter, extra virgin olive oil, onions, halved and thinly sliced, garlic cloves, to taste, chopped, red potatoes, to taste, peeled and cut into large cubes, salt , to taste, black pepper, freshly ground , to taste, white-fleshed fish, cleaned and gutted (grey mullet & whiting good choices), lemon , juice of, parsley, chopped fresh flat leaf, for garnish